Mathematics – Combinatorics
Scientific paper
2006-05-17
Annales de l'IHP - Probabilit\'es et Statistiques (2008) Vol. 44, No. 2, 293-323
Mathematics
Combinatorics
Scientific paper
P\'olya processes are natural generalization of P\'olya-Eggenberger urn models. This article presents a new approach of their asymptotic behaviour {\it via} moments, based on the spectral decomposition of a suitable finite difference operator on polynomial functions. Especially, it provides new results for {\it large} processes (a P\'olya process is called {\it small} when 1 is simple eigenvalue of its replacement matrix and when any other eigenvalue has a real part $\leq 1/2$; otherwise, it is called large).
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