"क्रमगुणित": अवतरणों में अंतर

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== बाहरी कड़ियाँ ==
* [https://web.archive.org/web/20120207104419/http://www.luschny.de/math/factorial/approx/SimpleCases.html Approximation formulas]
* [https://web.archive.org/web/20120119094723/http://factorielle.free.fr/index_en.html All about factorial notation n!]
* [https://web.archive.org/web/20120304125400/http://www.docstoc.com/docs/5606124/Double-Factorials-Selected-Proofs-and-Notes "Double Factorial Derivations"]
;Factorial calculators and algorithms
* [https://web.archive.org/web/20120210213942/http://web.ics.purdue.edu/~chen165/Math.htm Factorial Calculator]: instantly finds factorials up to 10^14!
* [https://web.archive.org/web/20100515123226/http://www.gfredericks.com/main/sandbox/arith/factorial Animated Factorial Calculator]: shows factorials calculated as if by hand using common elementary school aglorithms
* [https://web.archive.org/web/20120121122034/http://demonstrations.wolfram.com/Factorial/ "Factorial"] by [[Ed Pegg, Jr.]] and Rob Morris, [[Wolfram Demonstrations Project]], 2007.
* [https://web.archive.org/web/20050305083634/http://www.luschny.de/math/factorial/FastFactorialFunctions.htm Fast Factorial Functions (with source code in Java, C#, C++, Scala and Go)]
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