Brahmagupta was a pioneer in the field of mathematics and astronomy. He was born during A. D. 598 in Bhinmal in the Jalore district of Rajasthan. His principal works are Brāhmasphuṭa Siddhānta and Khaṇḍakhādyakaraṇa. The former, composed in A. D. 628, has been commented upon by Caturveda Pṛthūdaka Svāmin (A. D. 860), in detail, probably following the tradition of the original author.
As a mathematician, Brahmagupta is famous for his work on cakrīyacaturbhuja or cyclic quadrilaterals. His astronomical writings were well-known in Western India even by A. D. 712.
The length of the year as determined by him is slightly less than what is accepted by most of the astronomical texts.
Bhāskarācārya (A. D. 1114-1160), the celebrated astronomer, has described Brahmagupta as Gaṇakacakracūḍāmaṇi (the crest-jewel among mathematicians).