Université Paris 6
Pierre et Marie Curie
Université Paris 7
Denis Diderot

CNRS U.M.R. 7599
``Probabilités et Modèles Aléatoires''

Ranked fragmentations

Auteur(s):

Code(s) de Classification MSC:

Résumé: In this paper we define and study self-similar ranked fragmentations. We first show that any ranked fragmentation is the image of some partition-valued fragmentation, and that there is in fact a one-to-one correspondence between the laws of these two types of fragmentations. We then give an explicit construction of homogeneous ranked fragmentations in terms of Poisson point processes. Finally we use this construction and classical results on records of Poisson point processes to study the small-time behavior of a ranked fragmentation.

Mots Clés: Fragmentation ; self-similar ; subordinator ; exchangeable partitions ; record process

Date: 2001-10-24

Prépublication numéro: PMA-694