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Stirling's formula

[stur-lingz]
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noun Mathematics.
  1. a relation that approximates the value of n factorial (n!), expressed as .
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Origin of Stirling's formula

1925–30; after James Stirling (died 1770), Scottish mathematician
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for stirling's formula

Stirling's formula

noun
  1. a formula giving the approximate value of the factorial of a large number n, as n ! (n / e) n √(2π n)
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Word Origin

named after James Stirling (1692–1770), Scottish mathematician
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012