Conditional limit theorems for intermediately subcritical branching processes in random environment

V. I. Afanasyev; Ch. Böinghoff; G. Kersting; V. A. Vatutin

Annales de l'I.H.P. Probabilités et statistiques (2014)

  • Volume: 50, Issue: 2, page 602-627
  • ISSN: 0246-0203

Abstract

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For a branching process in random environment it is assumed that the offspring distribution of the individuals varies in a random fashion, independently from one generation to the other. For the subcritical regime a kind of phase transition appears. In this paper we study the intermediately subcritical case, which constitutes the borderline within this phase transition. We study the asymptotic behavior of the survival probability. Next the size of the population and the shape of the random environment conditioned on non-extinction is examined. Finally we show that conditioned on non-extinction periods of small and large population sizes alternate. This kind of ‘bottleneck’ behavior appears under the annealed approach only in the intermediately subcritical case.

How to cite

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Afanasyev, V. I., et al. "Conditional limit theorems for intermediately subcritical branching processes in random environment." Annales de l'I.H.P. Probabilités et statistiques 50.2 (2014): 602-627. <http://eudml.org/doc/272094>.

@article{Afanasyev2014,
abstract = {For a branching process in random environment it is assumed that the offspring distribution of the individuals varies in a random fashion, independently from one generation to the other. For the subcritical regime a kind of phase transition appears. In this paper we study the intermediately subcritical case, which constitutes the borderline within this phase transition. We study the asymptotic behavior of the survival probability. Next the size of the population and the shape of the random environment conditioned on non-extinction is examined. Finally we show that conditioned on non-extinction periods of small and large population sizes alternate. This kind of ‘bottleneck’ behavior appears under the annealed approach only in the intermediately subcritical case.},
author = {Afanasyev, V. I., Böinghoff, Ch., Kersting, G., Vatutin, V. A.},
journal = {Annales de l'I.H.P. Probabilités et statistiques},
keywords = {branching process; random environment; random walk; change of measure; survival probability; functional limit theorem; tree},
language = {eng},
number = {2},
pages = {602-627},
publisher = {Gauthier-Villars},
title = {Conditional limit theorems for intermediately subcritical branching processes in random environment},
url = {http://eudml.org/doc/272094},
volume = {50},
year = {2014},
}

TY - JOUR
AU - Afanasyev, V. I.
AU - Böinghoff, Ch.
AU - Kersting, G.
AU - Vatutin, V. A.
TI - Conditional limit theorems for intermediately subcritical branching processes in random environment
JO - Annales de l'I.H.P. Probabilités et statistiques
PY - 2014
PB - Gauthier-Villars
VL - 50
IS - 2
SP - 602
EP - 627
AB - For a branching process in random environment it is assumed that the offspring distribution of the individuals varies in a random fashion, independently from one generation to the other. For the subcritical regime a kind of phase transition appears. In this paper we study the intermediately subcritical case, which constitutes the borderline within this phase transition. We study the asymptotic behavior of the survival probability. Next the size of the population and the shape of the random environment conditioned on non-extinction is examined. Finally we show that conditioned on non-extinction periods of small and large population sizes alternate. This kind of ‘bottleneck’ behavior appears under the annealed approach only in the intermediately subcritical case.
LA - eng
KW - branching process; random environment; random walk; change of measure; survival probability; functional limit theorem; tree
UR - http://eudml.org/doc/272094
ER -

References

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