Today is the 100th death anniversary of the amazing mathematician Srinivasa Ramanujan. He passed away at a young age of 32 on April 26, 1920, at Kumbakonam in Tamil Nadu.

https://en.wikipedia.org/wiki/Srinivasa_Ramanujan

"Though he (Ramanujan) had almost no formal training in pure mathematics, he made substantial contributions to mathematical analysis, number theory, infinite series, and continued fractions, including solutions to mathematical problems then considered unsolvable."

"Ramanujan initially developed his own mathematical research in isolation:"He tried to interest the leading professional mathematicians in his work, but failed for the most part. What he had to show them was too novel, too unfamiliar, and additionally presented in unusual ways.."

"Seeking mathematicians who could better understand his work, in 1913 he began a postal partnership with the English mathematician G. H. Hardy at the University of Cambridge, England. Recognizing Ramanujan's work as extraordinary, Hardy arranged for him to travel to Cambridge."

"In his notes, Ramanujan had produced groundbreaking new theorems, including some that Hardy said had "defeated him and his colleagues completely", in addition to rediscovering recently proven but highly advanced results."

"During his short life, Ramanujan independently compiled nearly 3,900 results (mostly identities and equations). Many were completely novel; his original and highly unconventional results, such as the Ramanujan prime, the Ramanujan theta function, partition formulae..."

"Nearly all his claims have now been proven correct. The Ramanujan Journal, a scientific journal, was established to publish work in all areas of mathematics influenced by Ramanujan, and his notebooks—containing summaries of his published and unpublished results..."

"Ramanujan became one of the youngest Fellows of the Royal Society and only the second Indian member, and the first Indian to be elected a Fellow of Trinity College, Cambridge."

https://en.wikipedia.org/wiki/Srinivasa_Ramanujan

"Of his (Ramanujan's) original letters, Hardy stated that a single look was enough to show they could only have been written by a mathematician of the highest calibre, comparing Ramanujan to mathematical geniuses such as Euler and Jacobi."

Here's a good old thread about Ramanujan, compiled by @ainvvy: https://twitter.com/ainvvy/status/679155813475160064