Aryabhatta is one the greatest mathematicians / astronomers India has seen. He lived during AD 476-550. His famous works are Aryabhatiya and Arya Siddanta. Aryabhatiya covers arithmetic, algebra, plane trigonometry, spherical trigonometry, fractions, quadratic equations, sum of power series and table of sines. His works were translated in Arabic by Al-Khwarizmi, which influenced the adoption of Hindu-Arabic Numerals in Europe from the 12^th Century.

Contributions:

Invention of Zero

Arithmetic

Calculation of Longitudes

Decimal Place Valuation

Measuring Earth’s circumference

Hindu Arabic Number System

Pi is irrational

Solutions for Diophantine Equations

Definitions of Sine, Cosine, versine, Inverse Sine influenced the birth of Trignometry

Calendar Calculations  for Panchanga