: Mathematics: Bhargava factorial

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Bhargava factorial

In mathematics, Bhargava's factorial function, or simply Bhargava factorial, is a certain generalization of the factorial function developed by the Fields Medal winning mathematician Manjul Bhargava as part of his thesis in Harvard University in 1996. The Bhargava factorial has the property that many number-theoretic results involving the ordinary factorials remain true even when the factorials are replaced by the Bhargava factorials. Using an arbitrary infinite subset S of the set ${\\displaystyle \\mathbb {Z} }$ of integers, Bhargava associated a positive integer with every positive integer k, which he denoted by k !_S, with the property that if one takes S = ${\\displaystyle \\mathbb {Z} }$ itself, then the integer associated with k, that is k !_{${\\displaystyle \\mathbb {Z} }$}, would turn out to be the ordinary factorial of k
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Bhargava_factorial)

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