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Central limit theorem for bifurcating markov chains under L2-ergodic conditions

Published online by Cambridge University Press:  15 June 2022

S. Valère Bitseki Penda*
Affiliation:
Université Bourgogne Franche-Comté, IMB, CNRS-UMR 5584
Jean-François Delmas*
Affiliation:
CERMICS, Ecole des Ponts
*
*Postal address: Université Bourgogne Franche-Comté, IMB, CNRS-UMR 5584, 9 avenue Alain Savary, 21078 Dijon Cedex, France. Email address: [email protected]
**Postal address: CERMICS, Ecole des Ponts, 6 et 8, avenue Blaise Pascal Cité Descartes, Champs-sur-Marne 77455, Marne-la-Vallée Cedex 2, France. Email address: [email protected]

Abstract

Bifurcating Markov chains (BMCs) are Markov chains indexed by a full binary tree representing the evolution of a trait along a population where each individual has two children. We provide a central limit theorem for additive functionals of BMCs under $L^2$ -ergodic conditions with three different regimes. This completes the pointwise approach developed in a previous work. As an application, we study the elementary case of a symmetric bifurcating autoregressive process, which justifies the nontrivial hypothesis considered on the kernel transition of the BMCs. We illustrate in this example the phase transition observed in the fluctuations.

Type
Original Article
Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of Applied Probability Trust

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References

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