Abstract
Let be a supercritical branching process in an independent and identically distributed random environment ξ. We deduce the exact decay rate of the probability as , for each , assuming that . We also study the existence of harmonic moments of the random variable under a simple moment condition.
Soit un processus de branchement surcritique en environnement aléatoire ξ indépendant et identiquement distribué. Nous donnons un équivalent de la probabilité lorsque , pour tout , sous la condition . Nous étudions également l’existence des moments harmoniques de la variable aléatoire limite , sous une hypothèse simple d’existence de moments.
Funding Statement
The work has been supported by the Centre Henri Lebesgue (CHL, ANR-11-LABX-0020-01, France), and the National Natural Science Foundation of China (Grants No. 11971063, No. 12271062 and No. 11731012).
Acknowledgements
The authors are very grateful to the reviewers for very helpful comments and remarks, especially for pointing out a gap in the original version of the manuscript.
Quansheng Liu is the corresponding author.
Citation
Ion Grama. Quansheng Liu. Eric Miqueu. "Asymptotics of the distribution and harmonic moments for a supercritical branching process in a random environment." Ann. Inst. H. Poincaré Probab. Statist. 59 (4) 1934 - 1950, November 2023. https://doi.org/10.1214/22-AIHP1318
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