1 gen 628 anni - *I: Brahmagupta

Descrizione:

India: Brahmagupta invents the method of solving indeterminate equations of the second degree* and is the first to use algebra to solve astronomical problems. He also develops methods for calculations of the motions and places of various planets, their rising and setting, conjunctions, and the calculation of eclipses of the sun and the moon. His work is the first in which zero is clearly explained, and where the modern place-value Indian numeral system is fully developed. It also gives rules for manipulating both negative and positive numbers, and rules for summing series.

* Indeterminate equations, also called Diophantine equations, are polynomial equations, usually in two or more unknowns, such that only the integer solutions are sought or studied (i.e. a solution such that all the unknowns take integer values).

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