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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