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

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

The genealogy of self-similar fragmentations with negative index as a continuum random tree

Auteur(s):

Code(s) de Classification MSC:

Résumé: We encode a certain class of stochastic fragmentation processes, namely self-similar fragmentation processes with a negative index of self-similarity, into a metric family tree which belongs to the family of Continuum Random Trees of Aldous. When the splitting times of the fragmentation are dense near 0, the tree can in turn be encoded into a continuous height function, just as the Brownian Continuum Random Tree is encoded in a normalized Brownian excursion. Under mild hypotheses, we then compute the Hausdorff dimensions of these trees, and the maximal Hölder exponents of the height functions.

Mots Clés: Self-similar fragmentation ; continuum random tree ; Hausdorff dimension ; Hölder regularity

Date: 2003-11-12

Prépublication numéro: PMA-865