Research ArticleOpen accessPhrase in the titleElementary Combinatorial-Probabilistic Proof of the Wallis and Stirling FormulasMikhail KovalyovThis short note provides a remarkably simple derivation of the Wallis and Stirling formulas based on elementary estimates applied to binomial coefficients. As a byproduct an elementary proof of the central limit theorem for the binomial distribution is also obtained. …Journal of Mathematics and Statistics, Vol. 5, Issue 4 · 31 Dec 2009 · 8,081 accessesView PDFCite