The Stirling Approximation: a 5-minute Derivation!
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Stirling's Incredible Approximation // Gamma Functions, Gaussians, and Laplace's Method
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Stirling approximation derivation
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Physics 32.5 Statistical Thermodynamics (7 of 39) Stirling's Approximation Explained
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Stirling's Approximation for n! [Proof]
In mathematics, Stirling's approximation is an approximation for factorials. It is a good approximation, leading to accurate results even for small values of n. It is named after James Stirling, though it was first stated by Abraham de Moivre.