Nous étudions un cas particulier de système de particules avec branchement et sélection introduit par Bérard et Gouéré [Comm. Math. Phys. 298 (2010) 323-342]. Nous obtenons l'asympotique pour la vitesse, en remarquant un lien avec un processus de Galton-Watson surcritique censuré à un certain niveau.
We obtain the asymptotics for the speed of a particular case of a particle system with branching and selection introduced by Bérard and Gouéré [Comm. Math. Phys. 298 (2010) 323-342]. The proof is based on a connection with a supercritical Galton-Watson process censored at a certain level.
@article{AIHPB_2014__50_1_84_0, author = {Couronn\'e, Olivier and Gerin, Lucas}, title = {A branching-selection process related to censored Galton-Walton processes}, journal = {Annales de l'I.H.P. Probabilit\'es et statistiques}, volume = {50}, year = {2014}, pages = {84-94}, doi = {10.1214/12-AIHP504}, mrnumber = {3161523}, zbl = {1286.60085}, language = {en}, url = {http://dml.mathdoc.fr/item/AIHPB_2014__50_1_84_0} }
Couronné, Olivier; Gerin, Lucas. A branching-selection process related to censored Galton-Walton processes. Annales de l'I.H.P. Probabilités et statistiques, Tome 50 (2014) pp. 84-94. doi : 10.1214/12-AIHP504. http://gdmltest.u-ga.fr/item/AIHPB_2014__50_1_84_0/
[1] Branching Processes. Dover Publications Inc., Mineola, NY, 2004. | MR 2047480 | Zbl 1070.60001
and .[2] Brunet-Derrida behavior of branching-selection particle systems on the line. Comm. Math. Phys. 298 (2010) 323-342. | MR 2669438 | Zbl 1247.60124
and .[3] Probability: Theory and Examples, 2nd edition. Duxbury Press, Belmont, CA, 1996. | MR 1609153 | Zbl 1202.60002
.[4] Sums of Independent Random Variables. Springer, New York, 1975. | MR 388499 | Zbl 0322.60042
.[5] The time to extinction for Galton-Watson processes censored at a high level. Teor. Veroyatn. Primen. 54 (2009) 271-287. | MR 2761556 | Zbl 1203.60133
.[6] A degeneracy condition for a bounded branching process. Mat. Zametki 8 (1970) 9-18. | MR 267649 | Zbl 0232.60071
.