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This article is cited in 6 scientific papers (total in 7 papers)
Limit theorems for the Green function of the lattice Laplacian under large deviations of the random walk
S. A. Molchanovab, E. B. Yarovayab a University of North Carolina Charlotte
b M. V. Lomonosov Moscow State University, Faculty of Mechanics and Mathematics
Abstract:
We carry out a resolvent analysis of the lattice Laplacian (the generator of a simple random walk on the $d$-dimensional integer lattice) under large deviations of the random walk. This enables us to obtain asymptotic representations for the transition probability of the simple random walk and the corresponding Green function. We explicitly describe the asymptotic behaviour of the transition probability as the spatial and temporal variables jointly tend to infinity. The resulting Cramér-type expansion for the transition probability is ‘universal’ in this sense. In particular, it enables us to construct a scale for measuring the transition probability as a function of the time $t$ assuming that the spatial variable is of order $t^{\alpha}$ for various values of $\alpha\geqslant0$. We prove limit theorems on the asymptotic behaviour of the Green function of the transition probabilities under large deviations of the random walk.
Keywords:
branching random walk, difference Laplacian, large deviations,
spatio-temporal scale, asymptotics of the Green function, limit theorems.
Received: 16.02.2012
Citation:
S. A. Molchanov, E. B. Yarovaya, “Limit theorems for the Green function of the lattice Laplacian under large deviations of the random walk”, Izv. Math., 76:6 (2012), 1190–1217
Linking options:
https://www.mathnet.ru/eng/im7965https://doi.org/10.1070/IM2012v076n06ABEH002621 https://www.mathnet.ru/eng/im/v76/i6/p123
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