srinivasa ramanujan aiyangar (december 22, 1887 – april 26, 1920) was an indian mathematician. his father's name was k. srinivasa iyengar and his mother's name was komalatammal. on 1st october 1892 ramanujan was enrolled at local school. he had no formal training in mathematics. however, he has made a large contribution to number theory, infinite series and continued fractions.