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- W2969173106 abstract "We consider a supercritical catalytic branching random walk (CBRW) on a multidimensional lattice Z^d (d is positive integer). The main subject of study is the behavior of particles cloud in space and time. For CBRW on an integer line, Carmona and Hu (2014) examined the asymptotical behavior of the maximal coordinate M_n of the particles at time n. They proved that M_n/n converges to mu almost surely (on a set of local non-degeneracy of CBRW), as n tends to infinity, where mu>0 is a certain constant. Under additional assumption of a single catalyst in CBRW they also investigated the fluctuations of M_n with respect to mu n, as n grows to infinity. Bulinskaya (2018) extended the strong limit theorem by Carmona and Hu having estimated the rate of the population propagation for the front of a multidimensional CBRW. Now our aim is to analyze fluctuations of the propagation front in CBRW on Z^d. We not only solve the problem in a multidimensional setting but also, treating the case of an arbitrary finite number of catalysts for d = 1, generalize the result by Carmona and Hu with the help of other probabilistic-analytic methods. Keywords and phrases: catalytic branching random walk, supercritical regime, spread of population, propagation front, fluctuations of front." @default.
- W2969173106 created "2019-08-22" @default.
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- W2969173106 date "2020-01-01" @default.
- W2969173106 modified "2023-09-26" @default.
- W2969173106 title "Fluctuations of the Propagation Front of a Catalytic Branching Walk" @default.
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- W2969173106 doi "https://doi.org/10.1137/s0040585x97t989672" @default.
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