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Brahmagupta
Indian mathematician and astronomer (c. 598 - c. 668 CE) · India · Academics · Lived 598 to 670 · aged 72
Brahmagupta is read about 364 times a day, in 117 languages.
A typical day, 30 days to 15 October 2026
The middle day of the days counted, so one week of news cannot move it. The line under it is the last 390 days, one point a day.
Something wrong?He gave mathematics the number that meant nothing - and changed everything. Brahmagupta formalized zero as a concept, not just a placeholder, in 7th-century India, and handed later centuries the arithmetic they'd need to build the world.
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In their own words 6
The sum of two positive quantities is positive; of two negative is negative; of a positive and a negative is their difference; or, if they are equal, zero.
In subtraction, the less is to be taken from the greater, positive from positive; negative from negative.
The product of a negative quantity and a positive is negative; of two negatives, is positive; of two positives, is positive.
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About this person
Brahmagupta lived and worked in India during the early 7th century, producing two major texts that reshaped mathematics and astronomy. In 628 he completed the Brāhmasphuṭasiddhānta, a theoretical treatise that laid out the first clear description of the quadratic formula and established rules for operating with zero - treating it as a number in its own right, not merely a mark of absence. He was also the first Indian scholar to describe gravity as an attractive force, using the Sanskrit term "gurutvākarṣaṇam." Thirty-seven years later, in 665, he published the Khandakhadyaka, a more practical manual. The formalizations held, and the zero traveled.
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