Āryabhaṭa

Āryabhaṭa was born in 476 CE. At the age of 23, he composed the work Āryabhaṭīya. He flourished in Pātaliputra, the present day Patna. His work Āryabhaṭīya is the first available precisely dated work in the field of siddhāntic astronomy and mathematics. Though it is believed that it was preceded by many earlier astronomical siddhāntas, authentic datable versions of these are yet to be discovered. Āryabhaṭīya is a precise and highly condensed work. The second chapter of Āryabhaṭīya is Gaṇitapāda