Mathematical Analysis, Number Theory.
Srinivasa Ramanujan was an Indian mathematician who made significant contributions to mathematical analysis, number theory, and continued fractions. What made his achievements really extraordinary was the fact that he received almost no formal training in pure mathematics and started working on his own mathematical research in isolation.
He was the second and youngest Indian to join a Fellowship of the Royal Society. His outstanding contribution to the world of mathematics includes mathematical analysis, number theory, infinite series, and continued fractions. However, his most celebrated findings are said to be the infinite series of pi.
