Brahmagupta died in 670 CE in Ujjain, aged about 72. An Indian mathematician and astronomer, Brahmagupta worked at Ujjain, then a leading centre of astronomy, and in 628 composed the Brahmasphutasiddhanta. This text is notable for being among the first to give rules for working with zero and with negative numbers, treating them as numbers in their own right, and it presented methods for solving quadratic equations and a formula for the area of a cyclic quadrilateral. It also dealt with astronomical calculations such as eclipses and planetary positions. His work was translated into Arabic in the eighth century and helped carry Indian numerals and mathematical ideas to the Islamic world and later Europe. The dates given for his life are approximate.
Before and after
- from 661 CE to 750 CEUmayyad Caliphate
- 26 January 661 CEAssassination of Ali
- 670 CEConstruction of Great Mosque of Kairouan
- 670 CEConstruction of Kairouan
- 670 CEDeath of Brahmagupta
- from 680 CE to 1355Byzantine–Bulgarian Wars
- from 680 CE to 692 CESecond Fitna
- from 7 November 680 CE to 16 September 681 CEThird Council of Constantinople
- from 681 CE to 1018First Bulgarian Empire
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This moment belongs to the Medieval world (500 CE to 1500 CE), kingdoms, faiths and trade routes. You can also browse everything in the 7th century.