What are the contributions of Srinivasa Ramanujan?

Srinivasa Ramanujan made great contributions to the field of mathematics, including a collaboration with well-known mathematician H.G. Hardy in developing the formula for the number, p(n), of partitions of a number "n." His discoveries also led to the infinite series for infinity formulation.

Srinivasa Ramanujan was born in Madras, Tamil Nadu, in 1887 and lived until 1920. He had very little formal training in mathematics, largely teaching himself after taking an interest at the age of 10. He did not do well in college, however, because the only class that he passed was mathematics. Srinivasa was awarded a Bachelor of Science from Cambridge for his work involving highly composite numbers.