ब्राह्मस्फुटसिद्धान्त (ब्रह्मगुप्त - शून्य, कुट्टक, बीजगणित एवं सम्पूर्ण २१ अध्याय सान्वय सटीक)

The Brahmasphuta Siddhanta (ब्राह्मस्फुटसिद्धान्त) is the great astronomical and mathematical treatise of Brahmagupta (born 598 CE), completed in 628 CE at Bhillamala (modern Bhinmal, Rajasthan) when he was thirty. It holds a special place in the history of mathematics as the first text to treat zero as a number, with rules for adding, subtracting and multiplying with it, and to set out rules for positive and negative quantities. It also gives the formula for the area of a cyclic quadrilateral and the bhavana method for square-nature equations.

Its chapters deal with the mean and true motions of the planets, the three problems of time, place and direction, lunar and solar eclipses, risings and settings, the moon's crescent, planetary and stellar conjunctions, arithmetic and the kuttaka, shadows, the sphere and instruments.

This scan is Volume I of the 1966 edition from the Indian Institute of Astronomical and Sanskrit Research, New Delhi, with the Vasana, Vijnana and Hindi commentaries, prepared by an editorial board led by Acharya Ram Swarup Sharma, with a foreword by Dr. Sampurnanand and an introduction by Dr. Satya Prakash. It has 737 pages.