Discrete Mathematics & Theoretical Computer Science, Vol 12, No 2 (2010)

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Asymptotics of the Stirling numbers of the first kind revisited: A saddle point approach

Guy Louchard

Abstract


Using the saddle point method, we obtain from the generating function of the Stirling numbers of the first kind [nj] and Cauchy's integral formula, asymptotic results in central and non-central regions. In the central region, we revisit the celebrated Goncharov theorem with more precision. In the region j = n - nα, α > 1/2, we analyze the dependence of [nj] on α.

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