## 0598 – Brahmagupta – bio

Born in 0598 in the region of north western India currently known as Rajasthan, Brahmagupta is best known as the first mathematician to establish rules for working with the number “zero” as a quantity instead of a placeholder or a lack of quantity. He made one of the first documented attempts to use the principles of arithmetic with negative numbers, comparing “fortunes” (positive numbers) to “debts” (negative numbers). He designed an algorithm for computing square roots. Brahmagupta was the first to solve the quadratic equation and worked on what is now known as “Pell’s equation”, over a thousand years before Pell. He also made contributions in the field of astronomy and had significant influence on the development of both mathematics and astronomy in the Middle East.

PRECURSOR:

-0800 – Baudhayana

**-0575 – Pythagoras**

**-0325 – Euclid**

**-0287 – Archimedes**

200 – Diophantus

**0476 – Aryabhata**

0505 – Varahamihira

SUBSEQUENT:

**0780 = Al-Khwarizmi**

0800 – Mahavira

1114 – Bhaskara II

1130 – Al-Samawal

**1170 – Fibonacci**

1370 – Paramesvara

**1501 – Cardano**

**1596 – Descartes**

**1601 – Fermat**

1611 – Pell

**1736 – Lagrange**