Nous considérons un processus de fragmentation homogène tué à une barrière exponentielle. À l'aide de deux familles de martingales nous analysons la décroissance du plus gros fragment pour des valeurs des paramètres permettant la survie du système. Cet article traite aussi de la probabilité d'extinction du processus tué.
We consider a homogeneous fragmentation process with killing at an exponential barrier. With the help of two families of martingales we analyse the decay of the largest fragment for parameter values that allow for survival. In this respect the present paper is also concerned with the probability of extinction of the killed process.
@article{AIHPB_2014__50_2_476_0, author = {Knobloch, Robert and Kyprianou, Andreas E.}, title = {Survival of homogeneous fragmentation processes with killing}, journal = {Annales de l'I.H.P. Probabilit\'es et statistiques}, volume = {50}, year = {2014}, pages = {476-491}, doi = {10.1214/12-AIHP520}, mrnumber = {3189080}, zbl = {1301.60087}, language = {en}, url = {http://dml.mathdoc.fr/item/AIHPB_2014__50_2_476_0} }
Knobloch, Robert; Kyprianou, Andreas E. Survival of homogeneous fragmentation processes with killing. Annales de l'I.H.P. Probabilités et statistiques, Tome 50 (2014) pp. 476-491. doi : 10.1214/12-AIHP520. http://gdmltest.u-ga.fr/item/AIHPB_2014__50_2_476_0/
[1] Brunet-Derrida behavior of branching-selection particle systems on the line. Comm. Math. Phys. 298 (2010) 323-342. | MR 2669438 | Zbl 1247.60124
and .[2] The genealogy of branching Brownian motion with absorption. Ann. Probab. To appear. | MR 3077519 | Zbl pre06165630
, and .[3] Travelling waves and homogeneous fragmenation. Ann. Appl. Probab. 21 (2011) 1749-1794. | MR 2884050 | Zbl 1245.60069
, and .[4] Lévy Processes. Cambridge Univ. Press, Cambridge, 1996. | MR 1406564 | Zbl 0938.60005
.[5] Asymptotic behaviour of fragmentation processes. J. Europ. Math. Soc. 5 (2003) 395-416. | MR 2017852 | Zbl 1042.60042
.[6] Random Fragmentation and Coagulation Processes. Cambridge Univ. Press, Cambridge, 2006. | MR 2253162 | Zbl 1107.60002
.[7] Additive martingales and probability tilting for homogeneous fragmentations. Preprint, 2003.
and .[8] Discritization methods for homogeneous fragmentations. J. London Math. Soc. 72 (2005) 91-109. | MR 2145730 | Zbl 1077.60053
and .[9] Probability, 2nd edition. SIAM, Philadelphia, PA, 1992. | MR 1163370 | Zbl 0753.60001
.[10] The survival probability of a branching random walk in presence of an absorbing wall. Europhys. Lett. EPL 78 (2007) Art. 60006. | MR 2366713 | Zbl 1244.82071
and .[11] Quasi-stationary regime of a branching random walk in presence of an absorbing wall. J. Stat. Phys. 131 (2008) 203-233. | MR 2386578 | Zbl 1144.82321
and .[12] Probability: Theory and Examples. Duxbury Press, N. Scituate, 1991. | MR 2722836 | Zbl 1202.60002
.[13] Asymptotics for the survival probability in a supercritical branching random walk. Ann. Inst. H. Poincaré Probab. Statist. 47 (2011) 111-129. | Numdam | MR 2779399 | Zbl 1210.60093
, and .[14] Survival probabilities for branching Brownian motion with absorption. Elect. Comm. Probab. 12 (2007) 81-92. | MR 2300218 | Zbl 1132.60059
and .[15] Further probabilistic analysis of the Fisher-Kolmogorov-Petrovskii-Piscounov equation: One sided travelling waves. Ann. Inst. H. Poincaré Probab. Statist. 42 (2006) 125-145. | Numdam | MR 2196975 | Zbl 1093.60059
, and .[16] Strong law of large numbers for fragmentation processes. Ann. Inst. H. Poincaré Probab. Statist. 46 (2010) 119-134. | Numdam | MR 2641773 | Zbl 1195.60046
, and .[17] Asymptotic properties of fragmentation processes. Ph.D. thesis, Univ. Bath, 2011.
.[18] One-sided FKPP travelling waves in the context of homogeneous fragmentation processes. Preprint, 2012. Available at arXiv:1204.0758.
.[19] Introductory Lectures on Fluctuations of Lévy Processes with Applications. Springer, Berlin, 2006. | Zbl pre06176054
.