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Probability theory and mathematical statistics
On first-passage times for symmetric random walks without Lindeberg condition
A. I. Sakhanenko Sobolev Institute of Mathematics, pr. Koptyuga, 4, 630090, Novosibirsk, Russia
Abstract:
We consider exit times for random walks with independent but not necessarily identically distributed increments. We are going to describe an asymptotic behavior of the probability that the random walk stays above the moving boundary for a long time. In the paper by D. Denisov, A. Sakhanenko, and V. Wachtel (Ann. Probab., 2018) an universal asymptotic formula for such probability was found in the case when the random walk satisfies the classical Lindeberg condition. Now we investigate a question if it is possible to find similar asymptotics for more general random walks when increments may have infinite variances, but the central limit theorem is still valid. We obtain such result for a class of walks with symmetrically distributed increments.
Keywords:
random walk, symmetric distribution, exit time, central limit theorem, moving boundary.
Received November 22, 2022, published February 12, 2023
Citation:
A. I. Sakhanenko, “On first-passage times for symmetric random walks without Lindeberg condition”, Sib. Èlektron. Mat. Izv., 20:1 (2023), 86–99
Linking options:
https://www.mathnet.ru/eng/semr1572 https://www.mathnet.ru/eng/semr/v20/i1/p86
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Abstract page: | 65 | Full-text PDF : | 20 | References: | 17 |
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