Brahmagupta

Brahmagupta was another great astronomer who lived in the 7th century CE in Bhinamāla which is currently in the border of Gujarat and Rajasthan. He was a great authority in astronomy and mathematics. In 628 CE, at the age of 30, he wrote Brāhma-sphuṭa-siddhānta, a mathematical and astronomical work containing more than 1000 verse. He was given the title Gaṇaka-cakra-cūḍāmaṇi by Bhāskara II. The title mean 'the crest jewel amongst the group of mathematicians'. Brahmagupta is widely acknowledged to be the father of algebra. the basic operations of negative numbers and zero are documented for the first time in Brāhma-sphuṭa-siddhānta. Brahmagupta also gave the formulae for the diagonals and area of a cyclic quadrilateral in terms of its sides.