Born : 505 CE,Ujjain. Died : 587 CE. Education : Astronomer,Mathematician. Period : Gupta Era Works : 1) He improved the accuracy of sine tables of aryabhatta. 2) He defined the algebraic properties of zero as well as negative numbers. 3) He was among the first mathematician to discover a version of what is now known as the pascal’s triangle. 4) He used to calculate the binomial coefficients. 5) Pancha-siddhantika. Books : 1) Brihat Jataka 2) Birihat Samhitha 3) Hora Sara