biography of ramanujan in english

Srinivasa Ramanujan

(1887-1920)

Who Was Srinivasa Ramanujan?

After demonstrating an intuitive grasp of mathematics at a young age, Srinivasa Ramanujan began to develop his own theories and in 1911, he published his first paper in India. Two years later Ramanujan began a correspondence with British mathematician G. H. Hardy that resulted in a five-year-long mentorship for Ramanujan at Cambridge, where he published numerous papers on his work and received a B.S. for research. His early work focused on infinite series and integrals, which extended into the remainder of his career. After contracting tuberculosis, Ramanujan returned to India, where he died in 1920 at 32 years of age.

Srinivasa Ramanujan was born on December 22, 1887, in Erode, India, a small village in the southern part of the country. Shortly after this birth, his family moved to Kumbakonam, where his father worked as a clerk in a cloth shop. Ramanujan attended the local grammar school and high school and early on demonstrated an affinity for mathematics.

When he was 15, he obtained an out-of-date book called A Synopsis of Elementary Results in Pure and Applied Mathematics , Ramanujan set about feverishly and obsessively studying its thousands of theorems before moving on to formulate many of his own. At the end of high school, the strength of his schoolwork was such that he obtained a scholarship to the Government College in Kumbakonam.

A Blessing and a Curse

However, Ramanujan’s greatest asset proved also to be his Achilles heel. He lost his scholarship to both the Government College and later at the University of Madras because his devotion to math caused him to let his other courses fall by the wayside. With little in the way of prospects, in 1909 he sought government unemployment benefits.

Yet despite these setbacks, Ramanujan continued to make strides in his mathematical work, and in 1911, published a 17-page paper on Bernoulli numbers in the Journal of the Indian Mathematical Society . Seeking the help of members of the society, in 1912 Ramanujan was able to secure a low-level post as a shipping clerk with the Madras Port Trust, where he was able to make a living while building a reputation for himself as a gifted mathematician.

Around this time, Ramanujan had become aware of the work of British mathematician G. H. Hardy — who himself had been something of a young genius — with whom he began a correspondence in 1913 and shared some of his work. After initially thinking his letters a hoax, Hardy became convinced of Ramanujan’s brilliance and was able to secure him both a research scholarship at the University of Madras as well as a grant from Cambridge.

The following year, Hardy convinced Ramanujan to come study with him at Cambridge. During their subsequent five-year mentorship, Hardy provided the formal framework in which Ramanujan’s innate grasp of numbers could thrive, with Ramanujan publishing upwards of 20 papers on his own and more in collaboration with Hardy. Ramanujan was awarded a bachelor of science degree for research from Cambridge in 1916 and became a member of the Royal Society of London in 1918.

Doing the Math

"[Ramanujan] made many momentous contributions to mathematics especially number theory," states George E. Andrews, an Evan Pugh Professor of Mathematics at Pennsylvania State University. "Much of his work was done jointly with his benefactor and mentor, G. H. Hardy. Together they began the powerful "circle method" to provide an exact formula for p(n), the number of integer partitions of n. (e.g. p(5)=7 where the seven partitions are 5, 4+1, 3+2, 3+1+1, 2+2+1, 2+1+1+1, 1+1+1+1+1). The circle method has played a major role in subsequent developments in analytic number theory. Ramanujan also discovered and proved that 5 always divides p(5n+4), 7 always divides p(7n+5) and 11 always divides p(11n+6). This discovery led to extensive advances in the theory of modular forms."

But years of hard work, a growing sense of isolation and exposure to the cold, wet English climate soon took their toll on Ramanujan and in 1917 he contracted tuberculosis. After a brief period of recovery, his health worsened and in 1919 he returned to India.

The Man Who Knew Infinity

Ramanujan died of his illness on April 26, 1920, at the age of 32. Even on his deathbed, he had been consumed by math, writing down a group of theorems that he said had come to him in a dream. These and many of his earlier theorems are so complex that the full scope of Ramanujan’s legacy has yet to be completely revealed and his work remains the focus of much mathematical research. His collected papers were published by Cambridge University Press in 1927.

Of Ramanujan's published papers — 37 in total — Berndt reveals that "a huge portion of his work was left behind in three notebooks and a 'lost' notebook. These notebooks contain approximately 4,000 claims, all without proofs. Most of these claims have now been proved, and like his published work, continue to inspire modern-day mathematics."

A biography of Ramanujan titled The Man Who Knew Infinity was published in 1991, and a movie of the same name starring Dev Patel as Ramanujan and Jeremy Irons as Hardy, premiered in September 2015 at the Toronto Film Festival.

QUICK FACTS

• Name: Srinivasa Ramanujan
• Birth Year: 1887
• Birth date: December 22, 1887
• Birth City: Erode
• Birth Country: India
• Gender: Male
• Best Known For: Srinivasa Ramanujan was a mathematical genius who made numerous contributions in the field, namely in number theory. The importance of his research continues to be studied and inspires mathematicians today.
• Education and Academia
• Astrological Sign: Sagittarius
• University of Madras
• Cambridge University
• Nacionalities
• Death Year: 1920
• Death date: April 26, 1920
• Death City: Kumbakonam
• Death Country: India

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CITATION INFORMATION

• Article Title: Srinivasa Ramanujan Biography
• Author: Biography.com Editors
• Website Name: The Biography.com website
• Url: https://www.biography.com/scientists/srinivasa-ramanujan
• Access Date:
• Publisher: A&E; Television Networks
• Last Updated: September 10, 2019
• Original Published Date: September 10, 2015

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Biography of Srinivasa Ramanujan, Mathematical Genius

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Srinivasa Ramanujan (born December 22, 1887 in Erode, India) was an Indian mathematician who made substantial contributions to mathematics—including results in number theory, analysis, and infinite series—despite having little formal training in math.

Fast Facts: Srinivasa Ramanujan

• Full Name: Srinivasa Aiyangar Ramanujan
• Known For: Prolific mathematician
• Parents’ Names: K. Srinivasa Aiyangar, Komalatammal
• Born: December 22, 1887 in Erode, India
• Died: April 26, 1920 at age 32 in Kumbakonam, India
• Spouse: Janakiammal
• Interesting Fact: Ramanujan's life is depicted in a book published in 1991 and a 2015 biographical film, both titled "The Man Who Knew Infinity."

Early Life and Education

Ramanujan was born on December 22, 1887, in Erode, a city in southern India. His father, K. Srinivasa Aiyangar, was an accountant, and his mother Komalatammal was the daughter of a city official. Though Ramanujan’s family was of the Brahmin caste , the highest social class in India, they lived in poverty.

Ramanujan began attending school at the age of 5. In 1898, he transferred to Town High School in Kumbakonam. Even at a young age, Ramanujan demonstrated extraordinary proficiency in math, impressing his teachers and upperclassmen.

However, it was G.S. Carr’s book, "A Synopsis of Elementary Results in Pure Mathematics," which reportedly spurred Ramanujan to become obsessed with the subject. Having no access to other books, Ramanujan taught himself mathematics using Carr’s book, whose topics included integral calculus and power series calculations. This concise book would have an unfortunate impact on the way Ramanujan wrote down his mathematical results later, as his writings included too few details for many people to understand how he arrived at his results.

Ramanujan was so interested in studying mathematics that his formal education effectively came to a standstill. At the age of 16, Ramanujan matriculated at the Government College in Kumbakonam on a scholarship, but lost his scholarship the next year because he had neglected his other studies. He then failed the First Arts examination in 1906, which would have allowed him to matriculate at the University of Madras, passing math but failing his other subjects.

For the next few years, Ramanujan worked independently on mathematics, writing down results in two notebooks. In 1909, he began publishing work in the Journal of the Indian Mathematical Society, which gained him recognition for his work despite lacking a university education. Needing employment, Ramanujan became a clerk in 1912 but continued his mathematics research and gained even more recognition.

Receiving encouragement from a number of people, including the mathematician Seshu Iyer, Ramanujan sent over a letter along with about 120 mathematical theorems to G. H. Hardy, a lecturer in mathematics at Cambridge University in England. Hardy, thinking that the writer could either be a mathematician who was playing a prank or a previously undiscovered genius, asked another mathematician J.E. Littlewood, to help him look at Ramanujan’s work.

The two concluded that Ramanujan was indeed a genius. Hardy wrote back, noting that Ramanujan’s theorems fell into roughly three categories: results that were already known (or which could easily be deduced with known mathematical theorems); results that were new, and that were interesting but not necessarily important; and results that were both new and important.

Hardy immediately began to arrange for Ramanujan to come to England, but Ramanujan refused to go at first because of religious scruples about going overseas. However, his mother dreamed that the Goddess of Namakkal commanded her to not prevent Ramanujan from fulfilling his purpose. Ramanujan arrived in England in 1914 and began his collaboration with Hardy.

In 1916, Ramanujan obtained a Bachelor of Science by Research (later called a Ph.D.) from Cambridge University. His thesis was based on highly composite numbers, which are integers that have more divisors (or numbers that they can be divided by) than do integers of smaller value.

In 1917, however, Ramanujan became seriously ill, possibly from tuberculosis, and was admitted to a nursing home at Cambridge, moving to different nursing homes as he tried to regain his health.

In 1919, he showed some recovery and decided to move back to India. There, his health deteriorated again and he died there the following year.

Personal Life

On July 14, 1909, Ramanujan married Janakiammal, a girl whom his mother had selected for him. Because she was 10 at the time of marriage, Ramanujan did not live together with her until she reached puberty at the age of 12, as was common at the time.

Honors and Awards

• 1918, Fellow of the Royal Society
• 1918, Fellow of Trinity College, Cambridge University

In recognition of Ramanujan’s achievements, India also celebrates Mathematics Day on December 22, Ramanjan’s birthday.

Ramanujan died on April 26, 1920 in Kumbakonam, India, at the age of 32. His death was likely caused by an intestinal disease called hepatic amoebiasis.

Legacy and Impact

Ramanujan proposed many formulas and theorems during his lifetime. These results, which include solutions of problems that were previously considered to be unsolvable, would be investigated in more detail by other mathematicians, as Ramanujan relied more on his intuition rather than writing out mathematical proofs.

His results include:

• An infinite series for π, which calculates the number based on the summation of other numbers. Ramanujan’s infinite series serves as the basis for many algorithms used to calculate π.
• The Hardy-Ramanujan asymptotic formula, which provided a formula for calculating the partition of numbers—numbers that can be written as the sum of other numbers. For example, 5 can be written as 1 + 4, 2 + 3, or other combinations.
• The Hardy-Ramanujan number, which Ramanujan stated was the smallest number that can be expressed as the sum of cubed numbers in two different ways. Mathematically, 1729 = 1 3 + 12 3 = 9 3 + 10 3 . Ramanujan did not actually discover this result, which was actually published by the French mathematician Frénicle de Bessy in 1657. However, Ramanujan made the number 1729 well known. 1729 is an example of a “taxicab number,” which is the smallest number that can be expressed as the sum of cubed numbers in n different ways. The name derives from a conversation between Hardy and Ramanujan, in which Ramanujan asked Hardy the number of the taxi he had arrived in. Hardy replied that it was a boring number, 1729, to which Ramanujan replied that it was actually a very interesting number for the reasons above.
• Kanigel, Robert. The Man Who Knew Infinity: A Life of the Genius Ramanujan . Scribner, 1991.
• Krishnamurthy, Mangala. “The Life and Lasting Influence of Srinivasa Ramanujan.” Science & Technology Libraries , vol. 31, 2012, pp. 230–241.
• Miller, Julius. “Srinivasa Ramanujan: A Biographical Sketch.” School Science and Mathematics , vol. 51, no. 8, Nov. 1951, pp. 637–645.
• Newman, James. “Srinivasa Ramanujan.” Scientific American , vol. 178, no. 6, June 1948, pp. 54–57.
• O'Connor, John, and Edmund Robertson. “Srinivasa Aiyangar Ramanujan.” MacTutor History of Mathematics Archive , University of St. Andrews, Scotland, June 1998, www-groups.dcs.st-and.ac.uk/history/Biographies/Ramanujan.html.
• Singh, Dharminder, et al. “Srinvasa Ramanujan's Contributions in Mathematics.” IOSR Journal of Mathematics , vol. 12, no. 3, 2016, pp. 137–139.
• “Srinivasa Aiyangar Ramanujan.” Ramanujan Museum & Math Education Centre , M.A.T Educational Trust, www.ramanujanmuseum.org/aboutramamujan.htm.
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 MacTutor

Srinivasa aiyangar ramanujan.

A short uncouth figure, stout, unshaven, not over clean, with one conspicuous feature-shining eyes- walked in with a frayed notebook under his arm. He was miserably poor. ... He opened his book and began to explain some of his discoveries. I saw quite at once that there was something out of the way; but my knowledge did not permit me to judge whether he talked sense or nonsense. ... I asked him what he wanted. He said he wanted a pittance to live on so that he might pursue his researches.

I have passed the Matriculation Examination and studied up to the First Arts but was prevented from pursuing my studies further owing to several untoward circumstances. I have, however, been devoting all my time to Mathematics and developing the subject.

I can strongly recommend the applicant. He is a young man of quite exceptional capacity in mathematics and especially in work relating to numbers. He has a natural aptitude for computation and is very quick at figure work.

I have had no university education but I have undergone the ordinary school course. After leaving school I have been employing the spare time at my disposal to work at mathematics. I have not trodden through the conventional regular course which is followed in a university course, but I am striking out a new path for myself. I have made a special investigation of divergent series in general and the results I get are termed by the local mathematicians as 'startling'.

I was exceedingly interested by your letter and by the theorems which you state. You will however understand that, before I can judge properly of the value of what you have done, it is essential that I should see proofs of some of your assertions. Your results seem to me to fall into roughly three classes: (1)   there are a number of results that are already known, or easily deducible from known theorems; (2)   there are results which, so far as I know, are new and interesting, but interesting rather from their curiosity and apparent difficulty than their importance; (3)   there are results which appear to be new and important...

I have found a friend in you who views my labours sympathetically. ... I am already a half starving man. To preserve my brains I want food and this is my first consideration. Any sympathetic letter from you will be helpful to me here to get a scholarship either from the university of from the government.

What was to be done in the way of teaching him modern mathematics? The limitations of his knowledge were as startling as its profundity.

... that it was extremely difficult because every time some matter, which it was thought that Ramanujan needed to know, was mentioned, Ramanujan's response was an avalanche of original ideas which made it almost impossible for Littlewood to persist in his original intention.

Batty Shaw found out, what other doctors did not know, that he had undergone an operation about four years ago. His worst theory was that this had really been for the removal of a malignant growth, wrongly diagnosed. In view of the fact that Ramanujan is no worse than six months ago, he has now abandoned this theory - the other doctors never gave it any support. Tubercle has been the provisionally accepted theory, apart from this, since the original idea of gastric ulcer was given up. ... Like all Indians he is fatalistic, and it is terribly hard to get him to take care of himself.

I think we may now hope that he has turned to corner, and is on the road to a real recovery. His temperature has ceased to be irregular, and he has gained nearly a stone in weight. ... There has never been any sign of any diminuation in his extraordinary mathematical talents. He has produced less, naturally, during his illness but the quality has been the same. .... He will return to India with a scientific standing and reputation such as no Indian has enjoyed before, and I am confident that India will regard him as the treasure he is. His natural simplicity and modesty has never been affected in the least by success - indeed all that is wanted is to get him to realise that he really is a success.

References ( show )

• O Ore, Biography in Dictionary of Scientific Biography ( New York 1970 - 1990) . See THIS LINK .
• Biography in Encyclopaedia Britannica. http://www.britannica.com/biography/Srinivasa-Ramanujan
• B C Berndt and R A Rankin, Ramanujan : Letters and commentary ( Providence, Rhode Island, 1995) .
• G H Hardy, Ramanujan ( Cambridge, 1940) .
• R Kanigel, The man who knew infinity : A life of the genius Ramanujan ( New York, 1991) .
• J N Kapur ( ed. ) , Some eminent Indian mathematicians of the twentieth century ( Kapur, 1989) .
• S Ram, Srinivasa Ramanujan ( New Delhi, 1979) .
• S Ramanujan, Collected Papers ( Cambridge, 1927) .
• S R Ranganathan, Ramanujan : the man and the mathematician ( London, 1967) .
• P K Srinivasan, Ramanujan : Am inspiration 2 Vols. ( Madras, 1968) .
• P V Seshu Aiyar, The late Mr S Ramanujan, B.A., F.R.S., J. Indian Math. Soc. 12 (1920) , 81 - 86 .
• G E Andrews, An introduction to Ramanujan's 'lost' notebook, Amer. Math. Monthly 86 (1979) , 89 - 108 .
• B Berndt, Srinivasa Ramanujan, The American Scholar 58 (1989) , 234 - 244 .
• B Berndt and S Bhargava, Ramanujan - For lowbrows, Amer. Math. Monthly 100 (1993) , 644 - 656 .
• B Bollobas, Ramanujan - a glimpse of his life and his mathematics, The Cambridge Review (1988) , 76 - 80 .
• B Bollobas, Ramanujan - a glimpse of his life and his mathematics, Eureka 48 (1988) , 81 - 98 .
• J M Borwein and P B Borwein, Ramanujan and pi, Scientific American 258 (2) (1988) , 66 - 73 .
• S Chandrasekhar, On Ramanujan, in Ramanujan Revisited ( Boston, 1988) , 1 - 6 .
• L Debnath, Srinivasa Ramanujan (1887 - 1920) : a centennial tribute, International journal of mathematical education in science and technology 18 (1987) , 821 - 861 .
• G H Hardy, The Indian mathematician Ramanujan, Amer. Math. Monthly 44 (3) (1937) , 137 - 155 .
• G H Hardy, Srinivasa Ramanujan, Proc. London Math, Soc. 19 (1921) , xl-lviii.
• E H Neville, Srinivasa Ramanujan, Nature 149 (1942) , 292 - 294 .
• C T Rajagopal, Stray thoughts on Srinivasa Ramanujan, Math. Teacher ( India ) 11 A (1975) , 119 - 122 , and 12 (1976) , 138 - 139 .
• K Ramachandra, Srinivasa Ramanujan ( the inventor of the circle method ) , J. Math. Phys. Sci. 21 (1987) , 545 - 564 .
• K Ramachandra, Srinivasa Ramanujan ( the inventor of the circle method ) , Hardy-Ramanujan J. 10 (1987) , 9 - 24 .
• R A Rankin, Ramanujan's manuscripts and notebooks, Bull. London Math. Soc. 14 (1982) , 81 - 97 .
• R A Rankin, Ramanujan's manuscripts and notebooks II, Bull. London Math. Soc. 21 (1989) , 351 - 365 .
• R A Rankin, Srinivasa Ramanujan (1887 - 1920) , International journal of mathematical education in science and technology 18 (1987) , 861 -.
• R A Rankin, Ramanujan as a patient, Proc. Indian Ac. Sci. 93 (1984) , 79 - 100 .
• R Ramachandra Rao, In memoriam S Ramanujan, B.A., F.R.S., J. Indian Math. Soc. 12 (1920) , 87 - 90 .
• E Shils, Reflections on tradition, centre and periphery and the universal validity of science : the significance of the life of S Ramanujan, Minerva 29 (1991) , 393 - 419 .
• D A B Young, Ramanujan's illness, Notes and Records of the Royal Society of London 48 (1994) , 107 - 119 .

Additional Resources ( show )

Other pages about Srinivasa Ramanujan:

• Multiple entries in The Mathematical Gazetteer of the British Isles ,
• Miller's postage stamps
• Heinz Klaus Strick biography

Other websites about Srinivasa Ramanujan:

• Dictionary of Scientific Biography
• Dictionary of National Biography
• Encyclopaedia Britannica
• Ramanujan's last letter
• Srinivasa Rao
• Plus Magazine
• A Sen ( An article about the influence of Carr's book on Ramanujan )
• Kevin Brown ( Something else about 1729)
• The mathematician and his legacy ( YouTube video )
• Sci Hi blog
• Google doodle
• Mathematical Genealogy Project
• MathSciNet Author profile
• zbMATH entry

Honours ( show )

Honours awarded to Srinivasa Ramanujan

• Fellow of the Royal Society 1918
• Popular biographies list Number 1
• Google doodle 2012

Cross-references ( show )

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• Srinivasa Ramanujan

Srinivasa Ramanujan (1887-1920)

One of the greatest mathematicians of all time, Srinivasa Ramanujan was born in 1887 in the Southern part of India. He is still remembered for his contributions to the field of mathematics. Theorems formulated by him are to date studied by students across the world and within very few years of his lifespan, he made some exceptional discoveries in mathematics. 

His biography and achievements prove a lot about him and his struggles to contribute to the field of this subject. All this is also an essential part of the syllabus for aspirants preparing for the upcoming IAS Exam . 

The facts, achievements and contributions presented by Srinivasa Ramanujan have not just been acknowledged within India, but also globally by leading mathematicians. Aspirants can also learn about other Indian mathematicians and their contributions , by visiting the linked article. 

Srinivasa Ramanujan Biography [UPSC Notes]:- Download PDF Here

Indian Mathematician S. Ramanujan – Biography

Born in 1887, Ramanujan’s life, as said by Sri Aurobindo, was a “rags to mathematical riches” life story. His geniuses of the 20th century are still giving shape to 21st-century mathematics. 

Discussed below is the history, achievements, contributions, etc. of Ramanujan’s life journey.

Birth – 

• Srinivasa Ramanujan was born on 22nd December 1887 in the south Indian town of Tamil Nad, named Erode. 
• His father, Kuppuswamy Srinivasa Iyengar worked as a clerk in a saree shop and his mother, Komalatamma was a housewife. 
• Since a very early age, he had a keen interest in mathematics and had already become a child prodigy

Srinivasa Ramanujan Education –  

• He attained his early education and schooling from Madras , where he was enrolled in a local school
• His love for mathematics had grown at a very young age and was mostly self-taught
• He was a promising student and had won many academic prizes in high school
• But his love for mathematics proved to be a disadvantage when he reached college. As he continued to excel in only one subject and kept failing in all others . This resulted in him dropping out of college
• However, he continued to work on his collection of mathematical theorems, ideologies and concepts until he got his final breakthrough

Final Break Through –  

• S. Ramanujam did not keep all his discoveries to himself but continued to send his works to International mathematicians
• In 1912, he was appointed at the position of clerk in the Madras Post Trust Office, where the manager, S.N. Aiyar encouraged him to reach out to G.H. Hardy, a famous mathematician at the Cambridge University
• In 1913, he had sent the famous letter to Hardy, in which he had attached 120 theorems as a sample of his work
• Hardy along with another mathematician at Cambridge, J.E.Littlewood analysed his work and concluded it to be a work of true genius
• It was after this that his journey and recognition as one of the greatest mathematicians had started 

Death –  

• In 1919, Ramanujan’s health had started to deteriorate, after which he decided to move back to India
• After his return in 1920, his health further worsened and he died at the age of just 32 years

The life of such great Indians and their contribution in various fields is an important part of the UPSC Syllabus . Candidates preparing for the upcoming civil services exam must analyse this information carefully. 

Other Related Links:

Srinivasa Ramanujan Contributions

• Between 1914 and 1914, while Ramanujan was in England, he along with Hardy published over a dozen research papers
• During the time period of three years, he had published around 30 research papers
• Hardy and Ramanujan had developed a new method, now called the circle method , to derive an asymptomatic formula for this function
• His first paper published, a 17-page work on Bernoulli numbers that appeared in 1911 in the Journal of the Indian Mathematical Society
• One remarkable result of the Hardy-Ramanujan collaboration was a formula for the number p(n) of partitions of a number ‘n’

Achievements of Srinivasa Ramanujan

• At the age of 12, he had completely read Loney’s book on Plane Trignimetry and A Synopsis of Elementary Results in Pure and Applied Mathematics , which were way beyond the standard of a high school student
• In 1916 , he was granted a Bachelor of Science degree “by research” at the Cambridge University
• In 1918 , he became the first Indian to be honoured as a Fellow of the Royal Society
• In 1997, The Ramanujan Journal was launched to publish work “in areas of mathematics influenced by Ramanujan”
• The year 2012 was declared as the National Mathematical Year as it marked the 125th birth year of one of the greatest Indian mathematicians
• Since 2021, his birth anniversary, December 22, is observed as the National Mathematicians Day every year in India

The intention behind encouraging the significance of mathematics was mainly to boost youngsters who are the future of the country and influence them to have a keen interest in analysing the scope of this subject. 

Also, aspirants appearing in the civil services exam can choose mathematics as an optional and the success stories of IAS Toppers from the past have shown the scope of this subject. 

To get details of UPSC 2024 , candidates can visit the linked article. 

For any further information about the upcoming civil services examination , study material, preparation tips and strategy, candidates can visit the linked article. 

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• Srinivasa Ramanujan

Srinivasa Ramanujan was a famous Indian mathematician . In a lifespan of 32 years, Ramanujan contributed more to mathematics than many other accomplished mathematicians. English mathematician G. H. Hardy, who worked with him for a number of years, described him as a natural mathematical genius. Although he had no formal training in mathematics, he made significant contributions to mathematical analysis, infinite series, continued fractions and the number theory.

Ramanujan’s Early Life

Ramanujan was born on December 22, 1887, in the town of Erode in the South Indian state of Tamilnadu. He was born in an orthodox Hindu Brahmin family. His father’s name was K Srinivasa Iyengar and his mother was Komalatammal.

Even at a young age of 10, when mathematics was first introduced to him, Ramanujan had tremendous natural ability. He mastered trigonometry by the time he was 12 years old and developed theorems on his own. By the age of 17, he was conducting his own research in fields such as Bernoulli numbers and the Euler-Mascheroni constant.

Ramanujan’s Education

Ramanujan was a brilliant student, but his obsession with mathematics took a toll on the other subjects and he had to drop out of college as he was unable to get through his college examinations.

When he was 16 years old, he got a book entitled A Synopsis of Elementary Results in Pure and Applied Mathematics , which turned his life around. The book was just a compilation of thousands of mathematical facts, published mainly as a study aid for students. The book fascinated Ramanujan and he started working with the mathematical results given in it.

With no job and coming from a poor family, life was tough for him and he had to seek the help of friends to support himself while he worked on his mathematical discoveries and tried to get it noticed from accomplished mathematicians. Eventually an Indian mathematician, Ramachandra Rao, helped him get the post of a clerk at the Madras Port Trust.

Ramanujan Breaks into Mathematics

His life changed for the better in 1913 when he wrote to G. H. Hardy, an English mathematician. As a mathematician, Hardy was used to receiving prank letters from people claiming to have discovered something new in the field. Something about Ramanujan’s letter made him take a closer look and he and J. E. Littlewood, his collaborator, concluded that this one was different. The letter contained 120 statements on theorems related to the infinite series, improper integrals, continued fractions and the number theory.

Hardy wrote back to Ramanujan and his acknowledgement changed everything for the young mathematician. He became a research scholar at the University of Madras earning almost double what his job as a clerk was paying him. However, Hardy wanted him to come over to England.

Ramanujan’s Research

Ramanujan worked with Hardy for five years. Hardy was astonished by the genius of the young mathematician and said that he had never met anyone like him. His years at England were very decisive. He gained recognition and fame. Cambridge University gave him a Bachelor of Science degree just for his research in 1916 and he was elected a Fellow of the Royal Society in 1918.

Death and Legacy

Being a strict vegetarian and a religious person himself, the cultural differences and climatic conditions took a toll on his health. In 1917, he was hospitalized in a serious condition. His health improved in 1918 and he returned to India in 1919. However, his health problems got worse again and he died on April 26, 1920, in Chennai.

Ramanujan did not offer any proof for most of his mathematical results, but other mathematicians have validated and proved many of them. Some were known earlier and a few were found to be wrong, but the vast majority have been tested and shown to be correct.

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Srinivasa Ramanujan

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Srinivasa Ramanujan (1887-1920) was an Indian mathematician who made great and original contributions to many mathematical fields, including complex analysis , number theory , infinite series , and continued fractions . He was "discovered" by G. H. Hardy and J. E. Littlewood, two world-class mathematicians at Cambridge, and enjoyed an extremely fruitful period of collaboration with them from 1914 to 1919. Unfortunately, his mathematical career was curtailed by health problems; he returned to India and died when he was only 32 years old.

Hardy, who was a great mathematician in his own right, recognized Ramanujan's genius from a series of letters that Ramanujan sent to mathematicians at Cambridge in 1913. Like much of his writing, the letters contained a dizzying array of unique and difficult results, stated without much explanation or proof. The contrast between Hardy, who was above all concerned with mathematical rigor and purity, and Ramanujan, whose writing was difficult to read and peppered with mistakes but bespoke an almost supernatural insight, produced a rich partnership.

Since his death, Ramanujan's writings (many contained in his famous notebooks) have been studied extensively. Some of his conjectures and assertions have led to the creation of new fields of study. Some of his formulas are believed to be true but as yet unproven.

There are many existing biographies of Ramanujan. The Man Who Knew Infinity , by Robert Kanigel, is an accessible and well-researched historical account of his life. The rest of this wiki will give a brief and light summary of the mathematical life of Ramanujan. As an appetizer, here is an anecdote from Kanigel's book.

In 1914, Ramanujan's friend P. C. Mahalanobis gave him a problem he had read in the English magazine Strand . The problem was to determine the number \( x \) of a particular house on a street where the houses were numbered \( 1,2,3,\ldots,n \). The house with number \( x \) had the property that the sum of the house numbers to the left of it equaled the sum of the house numbers to the right of it. The problem specified that \( 50 < n < 500 \).

Ramanujan quickly dictated a continued fraction for Mahalanobis to write down. The numerators and denominators of the convergents to that continued fraction gave all solutions \( (n,x) \) to the problem \((\)not just the particular one where \( 50 < n < 500). \) Mahalanobis was astonished, and asked Ramanujan how he had found the solution.

Ramanujan responded, "...It was clear that the solution should obviously be a continued fraction; I then thought, which continued fraction? And the answer came to my mind."

This is not the most illuminating answer! If we cannot duplicate the genius of Ramanujan, let us at least find the solution to the original problem. What is \( x \)?

\(\) Bonus: Which continued fraction did Ramanujan give Mahalanobis?

This anecdote and problem is taken from The Man Who Knew Infinity , a biography of Ramanujan by Robert Kanigel.

Taxicab numbers, nested radicals and continued fractions, ramanujan primes, ramanujan sums, the ramanujan \( \tau \) function and ramanujan's conjecture.

Many of Ramanujan's mathematical formulas are difficult to understand, let alone prove. For instance, an identity such as

\[\frac1{\pi} = \frac{2\sqrt{2}}{9801}\sum_{k=0}^{\infty} \frac{(4k)!(1103+26390k)}{(k!)^4 396^{4k}}\]

is not particularly easy to get a handle on. Perhaps this is why the most famous mathematical fact about Ramanujan is trivial and uninteresting, compared to the many brilliant theorems he proved.

The story goes that Hardy was visiting Ramanujan in the hospital, and remarked offhandedly that the taxi he had taken had a "dull number," 1729. Instantly Ramanujan replied, "No, it is a very interesting number! It is the smallest positive integer expressible as the sum of two positive cubes in two different ways."

That is, \( 1729 = 1^3+12^3 = 9^3+10^3 \).

Hardy and Wright proved in 1938 that for every \( n \), there is a positive integer \( \text{Ta}(n) \) that is expressible as the sum of two positive cubes in \( n \) different ways. So \( \text{Ta}(2) = 1729 \). \((\)The value of \( \text{Ta}(2) \) had been known since the \(17^\text{th}\) century, which is in some sense characteristic of Ramanujan as well: as he was largely self-taught, he was often rediscovering theorems that were already well-known at the same time as he was constructing entirely new ones.\()\) The numbers \( \text{Ta}(n) \) are called taxicab numbers in honor of Hardy and Ramanujan.

Ramanujan developed several formulas that allowed him to evaluate nested radicals such as \[ 3 = \sqrt{1+2\sqrt{1+3\sqrt{1+4\sqrt{\cdots}}}}. \] This is a special case of a result from his notebooks, which is proved in the wiki on nested functions .

He also contributed greatly to the theory of continued fractions . One of the identities in his letter to Hardy was \[ 1+\frac{e^{-2\pi}}{1+\frac{e^{-4\pi}}{1+\frac{e^{-6\pi}}{\cdots}}} = \left( \sqrt{\frac{5+\sqrt{5}}2} - \frac{1+\sqrt{5}}2 \right)e^{2\pi/5}. \] This and several others along these lines were among the results that convinced Hardy that Ramanujan was a brilliant mathematician. This result is in fact a special case of the Rogers-Ramanujan continued fraction , which is of the form \[ R(q) = \frac{q^{1/5}}{1+\frac{q}{1+\frac{q^2}{1+\frac{q^3}{\cdots}}}} \] and is related to the theory of modular forms, a deep branch of modern number theory.

Ramanujan's work with modular forms produced the following celebrated divisibility results involving the partition function \( p(n) \): \[ \begin{align} p(5k+4) &\equiv 0 \pmod 5 \\ p(7k+5) &\equiv 0 \pmod 7 \\ p(11k+6) &\equiv 0 \pmod{11}. \end{align} \] Ramanujan commented in the paper in which he proved these results that there did not appear to be any other simple results of the same type. But in fact there are similar congruences of the form \( p(ak+b) \equiv 0 \pmod n \) for any \( n \) relatively prime to \( 6\); this is due to Ken Ono (2000). (Even for small \( n\), the values of \( a \) and \( b \) in the congruences are quite large.) The topic remains the subject of much contemporary research.

Ramanujan proved a generalization of Bertrand's postulate , as follows: Let \( \pi(x) \) be the number of positive prime numbers \( \le x \); then for every positive integer \( n \), there exists a prime number \( R_n \) such that \[ \pi(x)-\pi(x/2) \ge n \text{ for all } x \ge R_n. \] \((\)The case \( n = 1 \), \( R_n = 2 \) is Bertrand's postulate.\()\)

The \( R_n \) are called Ramanujan primes .

The sum \( c_q(n) \) of the \(n^\text{th}\) powers of the primitive \( q^\text{th}\) roots of unity is called a Ramanujan sum . It can be shown that these are multiplicative arithmetic functions , and in fact that \[c_q(n) = \frac{\mu\left(\frac qd\right)\phi(q)}{\phi\left(\frac qd\right)},\] where \( d = \text{gcd}(q,n)\), and \( \mu \) and \( \phi \) are the Mobius function and Euler's totient function , respectively.

Let \(c_{2015}(n)\) be the sum of the \(n^\text{th}\) powers of all the primitive \(2015^\text{th}\) roots of unity, \(\omega.\) Find the minimal value of \(c_{2015}(n)\) for all positive integers \(n\).

This year's problem

Ramanujan found nice infinite sums of the form \( \sum a_n c_q(n) \) or \( \sum a_q c_q(n) \) representing the standard arithmetic functions that are important in number theory. For instance, \[ d(n) = -\frac1{2\gamma+\ln(n)} \sum_{q=1}^{\infty} \frac{\ln(q)^2}{q} c_q(n), \] where \( \gamma \) is the Euler-Mascheroni constant .

Another example: the identity \[ \sum_{q=1}^{\infty} \frac{c_q(n)}{q} = 0 \] turns out to be equivalent to the prime number theorem .

Sums involving \( c_q(n) \) are known as Ramanujan sums ; these were also used in applications including the proof of Vinogradov's theorem that every sufficiently large odd positive integer is the sum of three primes.

Ramanujan's \( \tau \) function is defined by the formula \[ \sum_{n=1}^{\infty} \tau(n) q^n = q\prod_{n=1}^{\infty} (1-q^n)^{24} \] and is related to the theory of modular forms.

Ramanujan conjectured several properties of the \( \tau \) function, including \[ |\tau(p)| \le 2p^{11/2} \text{ for all primes } p. \] This turned out to be an extremely important and deep result, which was proved in 1974 by Pierre Deligne in his Fields-medal-winning proofs of the Weil conjectures on points on algebraic varieties over finite fields.

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Srinivasa Ramanujan | Biography, Contributions & Speech in English

Srinivasa Ramanujan Speech in English

The story of Srinivasa Ramanujan is one that can inspire anyone. His work in mathematics was remarkable and his life was full of challenges, but he persevered through them all. In this post, we’ll explore some of the key factors that make Srinivasa Ramanujan’s story so inspirational.

Who Was Srinivasa Ramanujan?

Srinivasa Ramanujan was an Indian mathematician who made significant contributions to a number of fields, including number theory, analysis, and combinatorics. He was born in 1887 in Erode, Tamil Nadu, and began showing signs of his mathematical genius at a young age. When he was just 12 years old, he taught himself advanced trigonometry from a book borrowed from a friend. Ramanujan’s breakthrough came when he met English mathematician G. H. Hardy at the University of Cambridge in 1913. Hardy recognized Ramanujan’s potential and helped him publish his work in prestigious mathematical journals. Ramanujan made major contributions to the field of number theory and developed novel techniques for solving mathematical problems. He also worked on approximating pi and discovered an infinite series that can be used to do so. Ramanujan returned to India in 1919 and continued working on mathematics until his untimely death in 1920 at the age of 32. Despite his short career, Ramanujan left a lasting legacy and is considered one of the greatest mathematicians of all time.

Ramanujan number speciality

Ramanujan numbers are a special class of integers that are named after the Indian mathematician Srinivasa Ramanujan. They are characterized by the fact that they are the smallest numbers that can be expressed as the sum of two cubes in more than one way. The first Ramanujan number is 1, which can be expressed as 1 = 1^3 + 0^3. The second Ramanujan number is 33, which can be expressed as 33 = 3^3 + 3^3. Ramanujan numbers have been studied extensively by mathematicians and have been found to have a variety of interesting properties. For example, it is known that there are infinitely many Ramanujan numbers, and that they become increasingly rare as they get larger. The study of Ramanujan numbers has led to the development of some deep mathematical results, including a connection with modular forms and theta functions.

The Early Life of Srinivasa Ramanujan

Srinivasa Ramanujan was born on December 22, 1887, in the small village of Erode, Tamil Nadu, India. His father, Kuppuswamy Srinivasa Iyengar, worked as a clerk in a sari shop and his mother, Nagammal, was a housewife. He was the couple’s second child; they had another son named Lakshmi Narasimhan and a daughter named Thanuja. Ramanujan showed an early interest in mathematics. At the age of five he gave his first public lecture on the topic. When he was eleven years old he obtained a copy of George Shoobridge Carr’s Synopsis of Elementary Results in Pure Mathematics. He mastered this book and went on to teach himself advanced mathematics from books borrowed from local libraries. In 1903 Ramanujan entered Pachaiyappa’s College in Madras where he studied subjects including English, Telugu, Tamil, Arithmetic and Geometry. He excelled in mathematics but struggled with other subjects due to his poor English skills. In 1904 Ramanujan failed his first-year examinations but passed them after taking them again the following year.

Also Read: Important Maths Formulas for Class 8

Ramanujan’s Contribution to Mathematics

Ramanujan was an Indian mathematician who made significant contributions to the field of mathematics. He is best known for his work on integer partitions and his discovery of the Ramanujan prime. Ramanujan’s work on integer partitions was a major contribution to the field of number theory. He developed a method to calculate the number of ways a positive integer can be expressed as a sum of other positive integers. This work has been credited with helping to pave the way for the development of combinatorial Theory. Ramanujan also made significant contributions to the field of analysis. He developed a new method for calculating pi that was more accurate than any previous method. He also discovered several new Infinite Series, including the Ramanujan Prime Series. Ramanujan’s work has had a lasting impact on mathematics and has inspired many other mathematicians to make their own contributions to the field.

The Ramanujan Prime and the Ramanujan theta function

Ramanujan was an Indian mathematician who made significant contributions to the field of number theory. He is perhaps best known for his discovery of the Ramanujan prime and the Ramanujan theta function. The Ramanujan prime is a prime number that can be expressed as a sum of two cubes in more than one way. The first few Ramanujan primes are 7, 17, 37, 59, 67, 97, 101, 103, 137, 149, 163, 173, 179, 191, 193, 223, 227, 229… As you can see, the list goes on indefinitely. In fact, it is believed that there are infinitely many Ramanujan primes! The Ramanujan theta function is a special function that allows for the representation of certain modular forms. It has many applications in number theory and combinatorics.

The Legacy of Srinivasa Ramanujan

In his short life, Srinivasa Ramanujan made incredible strides in the field of mathematics. His work has inspired other mathematicians and thinkers for generations. Ramanujan was born in India in 1887. At a young age, he showed a remarkable aptitude for mathematics. He did not receive formal training in mathematics, but he taught himself advanced topics such as calculus and number theory. Ramanujan’s work on infinite series and continued fractions led to new insights in these fields. He also developed novel methods for solving mathematical problems. Ramanujan’s work has had a lasting impact on mathematics and has inspired many subsequent mathematicians.

Why is Ramanujan’s story so inspiring?

Ramanujan’s story is so inspiring because he was born in a poor family in India and worked hard to achieve greatness. He did not have any special ability, but he worked on the problem for years and years until he finally solved it. In his later years, he was able to travel across Europe and speak at conferences about his work with infinite precision.

Ramanujan’s genius was not just limited to mathematics; it also extended into other fields such as physics and music theory.

Also Check Out : Geometry Formulas For Class 8

How can we learn from Ramanujan’s example?

To be a mathematician, you have to be a genius. And to be a genius, you have to work hard. You must study mathematics for years and years before becoming good enough at it that people will call your name out when they hear about new discoveries in mathematics (or any subject). Then once again, there are some very specific requirements for being called “a great mathematician” or “a great genius”:

• To write down your own theory so it is not just an idea but something that exists in reality somehow;
• To show how this new theory works on its own without needing anyone else’s help; and (this one applies more often than not)

Frequently Asked Questions of Srinivasa Ramanujan

Where and when was srinivasa ramanujan born.

Srinivasa Ramanujan was born on December 22nd 1887 in Erode, India. His father was a clerk at the government railway office, and his mother was a housewife.

What are some of Ramanujan’s contributions to mathematics?

Ramanujan has made many contributions to mathematics, including:

• The Ramanujan theta functions, which are used in number theory and analysis.
• Some of the earliest work on modular forms and harmonic numbers.
• A formula for a partition function that is important in statistical mechanics.

What is Srinivasa Ramanujan famous for?

Srinivasa Ramanujan is famous for his contributions to mathematical analysis, number theory and infinite series. He was also known for his ability to make accurate predictions about the behavior of numbers without having any formal training in mathematics.

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Srinivasa Ramanujan Biography: Education, Contribution, Interesting Facts

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Srinivasa Ramanujan: Srinivasa Ramanujan (1887–1920) was an Indian mathematician known for his brilliant, self-taught contributions to number theory and mathematical analysis. His work, including discoveries in infinite series and modular forms, has had a lasting impact on mathematics.

In this article, We have covered the Complete Biography of Srinivasa Ramanujan including his early childhood and education, Srinivasa Ramanujan’s Contribution to Mathematics, Interesting Facts about him, and many more.

Let’s dive right in.

Srinivasa Ramanujan Biography

Table of Content

Srinivasa Ramanujan Biography Overview

Srinivasa ramanujan early life and education, srinivasa ramanujan in england, srinivasa ramanujan contribution to mathematics, srinivasa ramanujan discovery, interesting facts about srinivasa ramanujan, awards and achievements of srinivasa ramanujan.

Here are some major details about Srinivasa Ramanujan FRS as mentioned below:

Srinivasa Ramanujan FRS was an Indian mathematician who was the mathematics god in contemporary times. The genius proposed some theories and works in the 20th century that are still relevant in this 21st century.

Birth of Srinivasa Ramanujan

Srinivasa Ramanujan was born on December 22, 1887, in Erode, India. A self-taught mathematician, he made significant contributions to number theory and mathematical analysis, despite facing limited formal education.He was born in a poor family. His father was a clerk. His mother was a homemaker.

He was born on 22nd December 1887. His native place is a south Indian town of Tamil Nadu, named Erode. His father Mr. Kuppuswamy Srinivasa Iyengar worked as a clerk in a saree shop. His mother Mrs. Komalatamma was a housewife.

Education of Srinivasa Ramanujan

Srinivasa Ramanujan did his early schooling in Madras. He was a self taught mathematician. He won so many academic prizes in his high school. In his college life started to study mathematics only. He performed bad in all other subjects. He dropped out of college due to the academic reasons. His theories got a final breakdown at this stage.

His early education was started in Madras. He fall in love with Mathematics at a very young age. He got many academis prizes in his school life. He continued to study one subject in collge and kept failing in other subjects. For this he became a dropped out student.

Final Breakthrough in life of Srinivasa Ramanujan

At this time Ramanujan sent his works to the International mathematicians. In 1912, he was working as a clerk in the Madras Post Trust Office. At this time he reached out to the famous mathematician G.H. Hardy. In 1913, he sent his 120 theorems to the famous mathematician G.H. Hardy. G.H. Hardy analysed his work and from here Ramanujan became a genius for the world. He moved to abroad to work more on these theories.

After dropping out from college, he started to send his work to International mathematicians. In 1912, he was appointed as a clerk of Madras Post Trust Office. The manager of Madras Post Trust Office, SN Aiyar helped him to communicate with G.H. Hardy.

Srinivasa Ramanujan’s time in England, particularly at Cambridge University, was a crucial period in his life marked by significant mathematical contributions, collaboration. Here is his time in England chronologically.

• 1914: Ramanujan arrived in England in April 1914, initially facing challenges in adapting to the climate and culture.
• Collaboration with G. H. Hardy: Upon his arrival, he started collaborating with G. H. Hardy at Cambridge University. Hardy recognized Ramanujan’s exceptional talent and the two worked closely on various mathematical problems.
• 1916: Despite lacking formal academic credentials, Ramanujan was admitted to Cambridge University based on the strength of his mathematical work. He became a research student.
• Contributions to Mathematics: Between 1914 and 1919, Ramanujan produced over 30 research papers, making profound contributions to number theory, modular forms, and elliptic functions, among other areas.
• Recognition and Fellowships: In 1918, Ramanujan was elected a Fellow of the Royal Society, a prestigious recognition of his outstanding contributions to mathematics.
• Health Challenges: Ramanujan faced health challenges during his time in England, exacerbated by malnutrition. His dedication to mathematics often led him to neglect his well-being.
• Return to India: Due to deteriorating health, Ramanujan returned to India in 1919. His contributions to mathematics during his time in England left an indelible mark on the field.

Here are some major contributions of Srinivasa Ramanujan as mentioned below:

• Developed advanced formulas for hypergeometric series and discovered relationships between different series.
• Contributed to the theory of q-series and modular forms.
• Identified the famous number 1729 as the smallest positive integer expressible as the sum of two cubes in two distinct ways.
• Introduced and studied mock theta functions, extending the theory of theta functions in modular forms.
• Investigated the partition function, yielding groundbreaking results and congruences that significantly advanced number theory.
• Proposed the concept of the Ramanujan prime, contributing to the understanding of prime numbers.
• Worked on the tau function, providing insights into modular forms and elliptic functions.
• Made profound contributions to the theory of theta functions and elliptic functions, impacting the field of complex analysis.
• Strived to unify different areas of mathematics, demonstrating a deep understanding of mathematical structures.
• Collaborated with G. H. Hardy at Cambridge University, resulting in joint publications that enriched the field of mathematics.
• Developed theorems in calculus, showcasing his ability to provide rigorous mathematical proofs for his intuitive results.

The following are some of the some of the notable discoveries of Srinivasa Ramanujan:

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• Ramanujan had no formal training in mathematics and was largely self-taught. His early exposure to advanced mathematical concepts was through books he obtained and studied on his own.
• Ramanujan was known for his intuitive approach to mathematics. He often presented results without formal proofs, and many of his theorems were later proven by other mathematicians.
• By the age of 13, Ramanujan had independently developed theorems in advanced trigonometry and infinite series. His mathematical talent was evident from a young age.
• As a child, Ramanujan discovered the formula for the sum of an infinite geometric series at the age of 14, which was published in the Journal of the Indian Mathematical Society.
• During a visit to Ramanujan in the hospital, G. H. Hardy mentioned taking a rather dull taxi with the number 1729. Ramanujan immediately replied that 1729 is an interesting number as it is the smallest number that can be expressed as the sum of two cubes in two different ways: 1729=13+123=93+1031729=13+123=93+103. This incident led to the term “taxicab number.”
• Ramanujan made substantial contributions to number theory, particularly in the areas of prime numbers, modular forms, and elliptic functions.
• In 1918, Ramanujan was elected a Fellow of the Royal Society, a prestigious recognition of his outstanding contributions to mathematics.
• Ramanujan faced health issues during his time in England, partly due to nutritional deficiencies. His dedication to mathematics sometimes led him to neglect his well-being.

Srinivasa Ramanujan FRS was a briliant personality from his childhood. He achieved so many things in his 35 years of life. Here is his Awards and Achievements given below.

He had completely read Loney’s book on Plane trigimetry at the age of 12.

• He became the first Indian to be honored as a Fellow of the Royal Society.
• In 1997, The Ramanujan Journal was launched to publish about his work.
• 2012 was declared as the National Mathematical Year in India.
• Since 2021 in India, his birth anniversary has been observed as the National Mathematicians Day every year.
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FAQs on Srinivasa Ramanujan Biography

What is the meaning of frs in srinivasa ramanujan.

The meaning of FRS is Fellow of Royal Society.

When did Ramanujan got FRS?

On  2nd May 1918 Ramanujan got FRS .

Why is 1729 called Ramanujan number?

1729 as the sum of two positive cubes. It is known as the Hardy–Ramanujan number.

What is Ramanujan famous for?

Ramanujan’s contribution extends to mathematical fields such as complex analysis, number theory, infinite series, and continued fractions. 

Why did Ramanujan died at 32?

At the age of 32 Ramanujan died due to tuberculosis.

What was the invention of Srinivasa Ramanujan?

Srinivasa Ramanujan made groundbreaking contributions to mathematics, discovering formulas for infinite series, introducing concepts like modular forms and mock theta functions, and making significant advancements in number theory. His work has had a lasting impact on diverse mathematical fields.

Who was the wife of Srinivasa Ramanujan?

Srinivasa Ramanujan’s wife was Janaki Ammal. They got married in July 1909 when Ramanujan was 21 years old, and Janaki was 10 years old. Their marriage was arranged, following the customs of the time in India.

Did Srinivasa Ramanujan have Child?

Yes, Srinivasa Ramanujan and his wife Janaki Ammal had a son named Namagiri Thayar. The couple named their son after the goddess Namagiri Thayar, to whom Ramanujan attributed the inspiration for some of his mathematical insights.

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Srinivasa Ramanujan was born on 22 December 1887 in the home of his maternal grandmother in Erode, India, a small town located about 250 miles southwest of Madras. Soon thereafter, his mother returned with her son to her home in Kumbakonam, approximately 160 miles south–southwest of Madras. Ramanujan's father was a clerk in a cloth merchant's shop, and his mother took in local college students to augment the family's meager income.

Ramanujan's mathematical talent was recognized in grammar school, and he won prizes, usually books of English poetry, in recognition of his mathematical skills. At the age of 15, Ramanujan borrowed G. S. Carr's Synopsis of Pure Mathematics from the local Government College in Kumbakonam. This unusual book, written by a Cambridge tutor to teach students, contained approximately 5,000 theorems, mostly without proofs, and was to serve as Ramanujan's primary source of mathematical knowledge.

With a scholarship, Ramanujan entered the Government College in...

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Albert, Robert S. Mathematical Giftedness and Mathematical Genius: A Comparison of G.H. Hardy and Srinivasa Ramanujan. Genius and the Mind: Studies in Creativity and Temperament . Ed. Andrew Steptoe. Oxford: Oxford University Press, 1998. 111–38.

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Berndt, Bruce C. and Robert A. Rankin. Ramanujan: Letters and Commentary . Providence: American Mathematical Society, 1995.

Berndt, Bruce and Robert Rankin. Ramanujan: Essays and Surveys . Oxford: Oxford University Press, 2002.

Berndt, Bruce C., Heng Huat Chan, and Ziang‐Cheng Zhang. Ramanujan's Association with Radicals in India. American Mathematical Monthly , 1997.

Hardy, G. H. Ramanujan . Cambridge: Cambridge University Press, 1940. Rpt. New York: Chelsea, 1978.

Kanigel, Robert. The Man Who Knew Infinity . New York: Charles Scribner's Sons, 1991.

Nandy, Ashis. Alternative Sciences–Creativity and Authenticity in Two Indian Scientists . New Delhi, India: Oxford University Press, 2001.

Ramanujan, Srinivasa. Collected Papers . Cambridge: Cambridge University Press, 1927. Rpt. New York: Chelsea, 1962.

‐‐‐. Notebooks . Bombay: Tata Institute of Fundamental Research, 1957.

‐‐‐. The Lost Notebook and Other Unpublished Papers . New Delhi: Narosa, 1988.

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Berndt, B.C. (2008). Ramanujan. In: Selin, H. (eds) Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-4425-0_8839

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Ramanujan | 10 Major Contributions And Achievements

Srinivasa Ramanujan FRS (1887 – 1920) was a self-taught Indian mathematical genius who made numerous contributions in several mathematical fields including mathematical analysis, infinite series, continued fractions, number theory and game theory . Ramanujan provided solutions to mathematical problems that were then considered unsolvable. Moreover, some of his work was so ahead of his time that mathematicians are still understanding its relevance . In 1914, Ramanujan found a formula for computing π (pi) that is currently the basis for the fastest algorithms used to calculate π. The circle method , which he developed with G. H. Hardy , constitute a large area of current mathematical research. Moreover, Ramanujan discovered K3 surfaces which play key roles today in string theory and quantum physics; while his mock modular forms are being used in an effort to unlock the secret of black holes. Know more about the achievements of Srinivasa Ramanujan through his 10 major contributions to mathematics.

#1 HE WAS THE SECOND INDIAN TO BE ELECTED A FELLOW OF THE ROYAL SOCIETY

A self-taught genius, Ramanujan moved to England in March 1914 after his talent was recognized by British mathematician G. H. Hardy . In 1916, Ramanujan was awarded a Bachelor of Science by Research degree (later named Ph.D.) by Cambridge even though he was not an undergraduate. The Ph.D. was awarded in recognition of his work on ‘Highly composite numbers’ . In 1918, Ramanujan became one of the youngest Fellows of the Royal Society and only the second Indian member . The same year he was elected a Fellow of Trinity College, Cambridge , the first Indian to be so honored . During his short lifespan of 32 years, Ramanujan independently compiled around 3,900 results . Apart from the below mentioned achievements his contributions include developing the relationship between partial sums and hyper-geometric series ; independently discovering Bernoulli numbers and using these numbers to formulated the value of Euler’s constant up to 15 decimal places ; discovering the Ramanujan prime number and the Landau–Ramanujan constant ; and coming up with Ramanujan’s sum and the Ramanujan’s master theorem.

#2 THE FASTEST ALGORITHMS FOR CALCULATION OF PI ARE BASED ON HIS SERIES

Finding an accurate approximation of π (pi) has been one of the most important challenges in the history of mathematics. In 1914, Srinivasa Ramanujan found a formula for computing pi that converges rapidly . His formula computes a further eight decimal places of π with each term in the series . It was in 1989, that Chudnovsky brothers computed π to over 1 billion decimal places on a supercomputer using a variation of Ramanujan’s infinite series of π. This was a world record for computing the most digits of pi . Moreover, the Ramanujan series is currently the basis for the fastest algorithms used to calculate π.

#3 RAMANUJAN CONJECTURE PLAYED A KEY ROLE IN THE FAMOUS LANGLANDS PROGRAM

In 1916 , Ramanujan published his paper titled “On certain arithmetical functions” . In the paper, Ramanujan investigated the properties of Fourier coefficients of modular forms . Though the theory of modular forms was not even developed then , he came up with three fundamental conjectures that served as a guiding force for its development . His first two conjectures helped develop the Hecke theory , which was formulated 20 years after his paper, in 1936, by German mathematician Erich Hecke . However, it was his last conjecture, known as the Ramanujan conjecture , that created a sensation in in 20th century mathematics . It played a pivotal role in the Langlands program , which began in 1970 through the proposal of American-Canadian mathematician Robert Langlands . The Langlands program aims to relate representation theory and algebraic number theory , two seemingly different fields of mathematics . It is widely viewed as the single biggest project in modern mathematical research . “On certain arithmetical functions” by Ramanujan thus effectively changed the course of 20th century mathematics .

#4 HE DEVELOPED THE INFLUENTIAL CIRCLE METHOD IN PARTITION NUMBER THEORY

A partition for a positive integer n is the number of ways the integer can be expressed as a sum of positive integers . For example p(4) = 5 . That means 4 can be expressed as a sum of positive integers in 5 ways: 4, 3+1, 2+2, 2+1+1 and 1+1+1 +1. Ramanujan, along with G. H. Hardy, invented the circle method which gave the first approximations of the partition of numbers beyond 200 . This method was largely responsible for major advances in the 20th century of notoriously difficult problems such as Waring’s conjecture and other additive questions. The circle method is now one of the central tools of analytic number theory . Moreover, circle method and its refinements constitute a large area of current mathematical research.

#5 HE DISCOVERED THE THREE RAMANUJAN’S CONGRUENCES

Related to the Partition Theory of Numbers, Ramanujan also came up with three remarkable congruences for the partition function p(n) . They are p(5n+4) = 0(mod 5); p(7n+4) = 0(mod 7); p(11n+6) = 0(mod 11) . For example, the first congruence means that if an integer is 4 more than a multiple of 5, then number of its partitions is a multiple of 5 . The study of Ramanujan type congruence is a popular research topic of number theory. It was in 2011, that a conceptual explanation for Ramanujan’s congruences was finally discovered . Ramanujan’s work on partition theory has applications in a number of areas including particle physics (particularly quantum field theory) and probability .

#6 NUMBER 1729 IS NAMED HARDY–RAMANUJAN NUMBER

In a famous incident British mathematician G. H. Hardy while visiting Ramanujan had ridden in a taxi cab with the number 1729 . He remarked to Ramanujan that the number “seemed to me rather a dull one, and that I hoped it was not an unfavorable omen” . “No,” Ramanujan replied, “it is a very interesting number; it is the smallest number expressible as the sum of two cubes in two different ways.” The two different ways are: 1729 = 1 3 + 12 3 = 9 3 + 10 3 . 1729 is now known as the Hardy–Ramanujan number . Moreover, numbers that are the smallest number that can be expressed as the sum of two cubes in n distinct ways are now referred to as taxicab numbers due to the incident. The relevance of 1729 has recently come to light as it was part of a much larger theory that Ramanujan was developing . Theorems have been established in theory of elliptic curves that involve this fascinating number.

#7 HE DID GROUNDBREAKING RESEARCH RELATED TO FERMAT’S LAST THEOREM

In 2013 famous Japanese American Mathematician Ken Ono , along with Sarah Trebat-Leder , found an equation by Ramanujan had clearly showed that he had been working on Fermat’s last theorem, one of the most notable and difficult to prove theorems in the history of mathematics. In 1637, French mathematician Pierre de Fermat had asserted that: if n is a whole number greater than 2 , then there are no positive whole number triples x, y and z , such that x n + y n = z n . This means that there are no numbers which satisfy the equations: x 3 + y 3 = z 3 ; x 4 + y 4 = z 4 ; and so on . The equation of Ramanujan illustrates that he had found an infinite family of positive whole number triples x, y and z that very nearly, but not quite, satisfy Fermat’s equation for n=3 . They are off only by plus or minus one . Among them is 1729 , which misses the mark by 1 for x=9, y=10 and z=12 . Moving forward, Ramanujan also considered the equations of the form: y 2 =x 3 + ax + b . If you plot the points (x,y) for this equation you get an elliptic curve . Elliptic curves played a key role when English mathematician Sir Andrew Wiles finally proved Fermat’s last theorem in 1994, a feat described as a “stunning advance” in mathematics.

#8 RAMANUJAN WAS THE FIRST TO DISCOVER K3 SURFACES

Ken Ono also found that Ramanujan went on to discover an object more complicated than elliptic curves. When it was re-discovered in 1958 by Andre Weil , it was named K3 surface . Thus it has come to light that Ramanujan was using 1729 and elliptic curves to develop formulas for a K3 surface. “Elliptic curves and K3 surfaces form an important next frontier in mathematics and Ramanujan gave remarkable examples illustrating some of their features that we didn’t know before.” Moreover, K3 surfaces play key roles today in string theory and quantum physics . Like, string theory suggests that the world consists of more than the three dimensions that we can see . These extra dimensions are rolled up tightly in tiny little spaces too small for us to perceive . These tiny spaces have a particular geometric structure. Calabi–Yau manifold is a class of geometric objects that have similar structure and one of the simplest classes of Calabi-Yau manifolds comes from K3 surfaces.

#9 HIS THETA FUNCTION LIES AT THE HEART OF STRING THEORY IN PHYSICS

In mathematics, theta functions are special functions of several complex variables . German Mathematician Carl Gustav Jacob Jacobi came up with several closely related theta functions known as Jacobi theta functions . Theta functions were studied extensively by Ramanujan. He came up with the Ramanujan theta function , which generalizes the form of Jacobi theta functions while also capturing their general properties . In particular, the Jacobi triple product takes on an elegant form when written in terms of the Ramanujan theta function . Ramanujan theta function has several important applications. It is used to determine the critical dimensions in Bosonic string theory, superstring theory and M-theory .

#10 HIS MOCK MODULAR FORMS MAY UNLOCK THE SECRET OF BLACK HOLES

In a 1920 letter to Hardy, Ramanujan described several new functions that behaved differently from known theta functions , or modular forms , and yet closely mimicked them. These were the first ever examples of mock modular forms . More than 80 years later, in 2002 , a description for these functions was provided by Sander Zwegers . Further, Ramanujan predicted that his mock modular forms corresponded to ordinary modular forms producing similar outputs for roots of 1 . Ken Ono ultimately showed that a mock modular form could be computed just as Ramanujan predicted . It was found as the output of mock modular forms shoot off to enormous numbers, the corresponding ordinary modular form expand at a similar rate and thus their difference is a relatively small number. Expansion of mock modular forms is now used to compute the entropy, or level of disorder, of black holes. Thus even through black holes were virtually unknown during his time, Ramanujan was able to do mathematics which may unlock their secret.

4 thoughts on “Ramanujan | 10 Major Contributions And Achievements”

A major method for computation of Feynman integrals is the bracket integration method, a direct result from his Master Theorem ( https://en.wikipedia.org/wiki/Ramanujan%27s_master_theorem )

What is plus and minus infinity, he used in his theta function? Infinity in two opposite directions?

very useful information but no that much recognition

awesome pic. loved it

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Srinivasa Ramanujan Biography

Ramanujan’s early years.

Srinivasa Ramanujan was one of the most famous mathematical wizards who made important contributions to the field of advanced mathematics. Srinivasa Ramanujan was born on 22 December, 1887, to a poor Brahmin family in Erode, a small village in Tamil Nadu, India.

He grew up in Kumbakonam town, near Chennai, where his father was employed as a clerk in a cloth merchant’s shop. He was an exceptionally good student and won a number of merit certificates and awards. He loved Mathematics more than any other subject.

Once, when he was just in his middle school classes, he mathematically calculated the approximate length of the equator. He also very clearly knew the values of the square root of two and value of pi!

Srinivasa Ramanujan – Education and work

• At the age of 16, he got a scholarship for his first year at the Government College in his hometown. His deep interest in Mathematics led him to neglect other subjects because of which he was not able to clear his examinations and had to forgo his scholarship. After dropping out of college, he had to struggle a lot to earn his living.
• However, it did not dampen Ramanujan’s spirits and he continued to work on problems and theorems. He bought a book authored by G. S. Carr which contained over 5000 problems. He worked and reworked all the problems and theorems and made new discoveries. He also found a job as an accounts clerk in the office of the Madras Port Trust.
• Then, he got in touch with V. Ramaswamy Aiyer, the founder of the Indian Mathematical Society. With his help, Ramanujan got his paper on Bernoulli numbers published in the ‘Journal of the Indian Mathematical Society’ in 1911. Soon, he became a quite popular in Chennai for his prowess in Mathematics.
• In 1913, he casually wrote to the well-known Cambridge mathematician, G. H. Hardy, and told him about his work. Hardy was mighty impressed with Ramanujan’s works and assisted him in getting a grant from Trinity College, Cambridge.
• Ramanujan moved abroad and started to work in collaboration with Hardy, but his health started failing. Despite poor health, he remained engrossed in his research and study of newer vistas in mathematics. In 1916, he graduated from Cambridge with a Bachelor of Science by Research.
• In 1920, he moved back to India and left for his heavenly abode.

What is Srinivasa Ramanujan famous for?

• Despite having almost no formal training in Mathematics , Ramanujan’s knowledge of the subject-matter was astounding. Without the knowledge of the modern developments in the subject, he had made some important contributions to the field of mathematical analysis, number theory, game theory, infinite series and continued fractions.
• He was a luminary who rose to great heights from a humble background and followed his heart against the odds in his way. His innovative ideas and vision still serve as a great resource for modern mathematicians.

The Man Who Knew Infinity

In the honour of Ramanujan, December 22 is now celebrated as the National Mathematics Day in India. His biography titled ‘The Man Who Knew Infinity‘ was published in 1991 and a movie based on him starring Dev Patel was also shown at the 2015 Toronto Film Festival.

Famous quotes by Srinivasa Ramanujan

• An equation means nothing to me unless it expresses a thought of God.
• I have not trodden through a conventional university course, but I am striking out a new path for myself. I have made a special investigation of divergent series in general and the results I get are termed by the local mathematicians as “startling.”
•   4 Shares

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Essay on Srinivasa Ramanujan

500 words essay on srinivasa ramanujan.

Srinivasa Ramanujan is one of the world’s greatest mathematicians of all time. Furthermore, this man, from a poor Indian family, rose to prominence in the field of mathematics. This essay on Srinivasa Ramanujan will throw more light on the life of this great personality.

                                                                                             Essay On Srinivasa Ramanujan

Early Life of Srinivasa Ramanujan

Ramanujan was born in Erode on December 22, 1887, in his grandmother’s house.  Furthermore, he went to primary school in Kumbakonamwas when he was five years old.  Moreover, he would attend several different primary schools before his entry took place to the Town High School in Kumbakonam in January 1898.

At the Town High School, Ramanujan proved himself as a talented student and did well in all of his school subjects. In 1900, he became involved with mathematics and began summing geometric and arithmetic series on his own.

In the Town High School, Ramanujan began reading a mathematics book called ‘Synopsis of Elementary Results in Pure Mathematics’. Furthermore, this book was by G. S. Carr.

With the help of this book, Ramanujan began to teach himself mathematics . Furthermore, the book contained theorems, formulas and short proofs. It also contained an index to papers on pure mathematics.

His Contribution to Mathematics

By 1904, Ramanujan’s focus was on deep research. Moreover, an investigation took place by him of the series (1/n). Moreover, calculation took place by him of Euler’s constant to 15 decimal places. This was entirely his own independent discovery.

Ramanujan gained a scholarship because of his outstanding performance in his studies. Consequently, he was a brilliant student at Kumbakonam’s Government College. Moreover, his fascination and passion for mathematics kept on growing.

In the spring of 1913, there was the presentation of Ramanujan’s work to British mathematicians by Narayana Iyer, Ramachandra Rao and E. W. Middlemast. Afterwards, M.J.M Hill did not made an offer to take Ramanujan on as a student, rather, he provided professional advice to him. With the help of friends, Ramanujan sent letters to leading mathematicians at Cambridge University and was ultimately selected.

Ramanujan spent a significant time period of five years at Cambridge. At Cambridge, collaboration took place of Ramanujan with Hardy and Littlewood. Most noteworthy, the publishing of his findings took place there.

Ramanujan received the honour of a Bachelor of Arts by Research degree in March 1916. This honour was due to his work on highly composite numbers, sections of the first part whose publishing had taken place the preceding year. Moreover, the paper’s size was more than fifty pages long.

Get the huge list of more than 500 Essay Topics and Ideas

Conclusion of the Essay on Srinivasa Ramanujan

Srinivasa Ramanujan is a man whose contributions to the field of mathematics are unmatchable. Furthermore, experts in mathematics worldwide all recognize his tremendous worth. Most noteworthy, Srinivasa Ramanujan made his country proud at a time when India was still under British occupation.

FAQs For Essay on Srinivasa Ramanujan

Question 1: What is Srinivasa Ramanujan famous for?

Answer 1: Srinivas Ramanujan is famous for his discoveries that have influenced several areas of mathematics. Furthermore, he is famous for his contributions to number theory and infinite series. Moreover, he came up with fascinating formulas that facilitate in the calculation of the digits of pi in unusual ways.

Question 2: What is the special quality of number 1729 discovered by Srinivasa Ramanujan?

Answer 2:  Srinivas Ramanujan discovered that the number 1729 had a special characteristic.  Furthermore, this quality is that the number 1729 is the only number whose expression can take place as the sum of the cubes of two different sets of numbers. Consequently, people call 1729 the magic number.

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Essay on Srinivasa Ramanujan in English - 100, 200, 500 Words

Srinivasa Ramanujan was the greatest mathematician of all time. He is still remembered for his contributions to the field of mathematics. Theorems formulated by him are to date studied by students across the world and within very few years of his lifespan, he made some exceptional discoveries in mathematics. Here are a few sample essays on Srinivasa Ramanujan.

100 Words Essay on Srinivasa Ramanujan

200 words essay on srinivasa ramanujan, 500 words essay on srinivasa ramanujan.

Srinivasa Ramanujan was a renowned mathematician of India. He was born on 22 December 1887 in Madras during the British Raj. Since childhood, he was drawn towards maths and took a particular interest in learning the subject. He did not receive formal education in mathematics but had mastered maths in various sections. During his time in Cambridge, he grew close to the great mathematician named Hardy. Together they invented the Hardy-Ramanujan number 1729. He got married at the age of 22 to Janakiammal on 14th July 1904. He wrote several books based on his theories and formulas. He even received the K. Ranganatha Rao prize for mathematics. On 26 April 1920, he departed at the age of 32.

Srinivasa Ramanujan was a well-known Indian Mathematician who was born on 22 December 1887 during British rule. He was born in a poor Indian village, Erode, belonging to a Tamil family. His father’s name was Kuppuswamy Srinivas Aiyangar who worked as a clerk in a saree shop, and his mother was a religious housewife. They lived in Erode only for a year and then moved to Kumbakonam.

In this small town, Ramanujan attended many primary schools and achieved a distinction in his primary education. At the age of thirteen, he focused his attention on the sum of geometric and arithmetic series and in 1902, he created a method to solve quadratic equations and even explored Euler’s Constant. In the same year, he received a scholarship for his outstanding performance in his studies, and therefore he was admitted at Kumbakonam’s Government college.

His passion for mathematics grew more robust, and hence he excelled in maths but failed in other subjects. The failure caused him depression, and he fled to Visakhapatnam without telling his parents. One year later, he returned to study and passed the First Art examination but again failed in all and passed in maths.

He published his first paper based on Bernoulli numbers in the Journal of the Indian Mathematical Society and received recognition and achievement. His hard work paid off, and he was appointed as a clerk at Madras Port Trust. At this time, he became famous throughout Madras and caught the attention of C.L.T Griffith who helped Ramanujan. Later, Ramanujan graduated from London and held a degree in Science for research on highly composite numbers.

Ramanujan is referred to as an Indian Mathematician who lived during the British period and who contributed substantially to mathematics analysis, number theory, infinite series and continued fractions. He has been described by many as a simple person with pleasant manners.

He was well-versed in the Brahmin culture and followed particular eating habits. Just before turning 10 years old, he passed his primary education in English, Tamil, geography and arithmetic. His scores were the best in the district. In the same year, he encountered formal mathematics for the first time.

At the age of sixteen, he acquired a library copy of ‘A Synopsis of Elementary Results in Pure and Applied Mathematics’ from a friend. He studied the contents of the book thoroughly. The next year, he developed and investigated the Bernoulli numbers and calculated Euler’s constant up to 15 decimals. His peers could hardly understand his nature, and were always in awe because of his brilliance. Due to his extraordinary mind, he received a scholarship to study at Government Arts College, Kumbakonam. But he lost this scholarship because of his firm determination towards studying only maths and ignoring other subjects.

Later, too he failed in subjects like English, Sanskrit and physiology. In 1906, he flunked his Fellow of Arts exam in December. Without a FA degree, he left college and decided to study independently in mathematics through research and referring books. Such a condition caused him extreme poverty, and he reached the brink of starvation.

Ramanujan met deputy collector V. Ramaswamy Aiyer in 1910, who was the founder of the Mathematical society and wished to work in the revenue department. When Ramanujan showed his mathematics book to him, he stated that he was struck by the extraordinary mathematical results contained in Ramanujan’s books. As he advanced further in maths, he even wrote his formal paper on the properties of Bernoulli numbers.

A journal editor M.T. Narayana Iyengar noted that Ramanujan’s methods and presentation was terse and lacked precision and clearness. An ordinary person could hardly follow him. In England, he was awarded a Bachelor of Arts by Research degree. He was also elected to the London Mathematical Society. Ramanujan was the first Indian to be elected a Fellow of Trinity College, Cambridge.

Achievements of Srinivasa Ramanujan

At the age of 12, he had completely read Loney’s book on Plane Trigonometry and A Synopsis of Elementary Results in Pure and Applied Mathematics, which were way beyond the standard of a high school student

In 1916, he was granted a Bachelor of Science degree “by research” at the Cambridge University

In 1918, he became the first Indian to be honoured as a Fellow of the Royal Society

In 1997, The Ramanujan Journal was launched to publish work “in areas of mathematics influenced by Ramanujan”

The year 2012 was declared as the National Mathematical Year as it marked the 125th birth year of one of the greatest Indian mathematicians

Since 2021, his birth anniversary, December 22, is observed as the National Mathematicians Day every year in India.

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