We design exact polynomial expansions of a class of Feynman–Kac particle distributions. These expansions are finite and are parametrized by coalescent trees and other related combinatorial quantities. The accuracy of the expansions at any order is related naturally to the number of coalescences of the trees. Our results include an extension of the Wick product formula to interacting particle systems. They also provide refined nonasymptotic propagation of chaos-type properties, as well as sharp $\mathbb{L}_{p}$ -mean error bounds, and laws of large numbers for U-statistics.
Publié le : 2009-04-15
Classification:
Feynman–Kac semigroups,
interacting particle systems,
trees and forests,
automorphism groups,
combinatorial enumeration,
47D08,
60C05,
60K35,
65C35,
31B10,
60J80,
65C05,
92D25
@article{1241702250,
author = {Del Moral, Pierre and Patras, Fr\'ed\'eric and Rubenthaler, Sylvain},
title = {Tree based functional expansions for Feynman--Kac particle models},
journal = {Ann. Appl. Probab.},
volume = {19},
number = {1},
year = {2009},
pages = { 778-825},
language = {en},
url = {http://dml.mathdoc.fr/item/1241702250}
}
Del Moral, Pierre; Patras, Frédéric; Rubenthaler, Sylvain. Tree based functional expansions for Feynman–Kac particle models. Ann. Appl. Probab., Tome 19 (2009) no. 1, pp. 778-825. http://gdmltest.u-ga.fr/item/1241702250/