Indian astronomer and mathematician.

Born: c. 598 AD

Died: c. 670 AD

**Discoveries**

**Astronomical Theory**

**Zero**

In his magnum opus *Brahmasphutasiddhanta*, Brahmagupta was the first known mathematician to document on the arithmetic properties of zero as a number. The concept of zero as a number may have been known in India prior to Brahmagupta. Radiocarbon dating of the *Bakhshali Manuscript* has revealed that parts of the document was written in the 4th century AD, the 7th century AD, and the 10th century AD.

**Approximation of Pi**

**Pell's Equation**

**Brahmagupta's Formula**