Aryabhata

      Aryabhata (Sanskrit: आर्यभट  listen (help·info); IAST: Āryabhaṭa) or Aryabhata I^[1][2] (476–550 CE)^[3][4] was the first in the line of great mathematician-astronomers from the classical age of Indian mathematics and Indian astronomy. His works include the Āryabhaṭīya (499 CE, when he was 23 years old)^[5] and the Arya-siddhanta.

            The works of Aryabhata dealt with mainly mathematics and astronomy. He also worked on the approximation for pi.

            The entire wiki link is at:  http://en.wikipedia.org/wiki/Aryabhata