Strong asymptotics of the generating polynomials of the stirling numbers of the second kind

Authors
Citation
C. Elbert, Strong asymptotics of the generating polynomials of the stirling numbers of the second kind, J APPROX TH, 109(2), 2001, pp. 198-217
Citations number
9
Categorie Soggetti
Mathematics
Journal title
JOURNAL OF APPROXIMATION THEORY
ISSN journal
00219045 → ACNP
Volume
109
Issue
2
Year of publication
2001
Pages
198 - 217
Database
ISI
SICI code
0021-9045(200104)109:2<198:SAOTGP>2.0.ZU;2-9
Abstract
Fur the horizontal generating functions P-n(z)=Sigma (n)(k=1) S(n, k)z(k) o f the Stirling numbers of the second kind. strong asymptotics are establish ed. as n --> x. By using the saddle point method for Q(n)(z) = P-n(nz) ther e are two main results: an oscillating asymptotic for z is an element of(-e . 0) and a uniform asymptotic on every compact subset of C\[ -e, 0]. Finall y. an Airy asymptotic. in thc neighborhood of -e is deduced. (C) 2001 Acade mic Press.