Geodesic
Large deviations for a~symmetric branching random walk on a~multidimensional lattice
Informatics and Automation, Branching processes, random walks, and related problems, Tome 282 (2013), pp. 195-211.

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An important role in the theory of branching random walks is played by the problem of the spectrum of a bounded symmetric operator, the generator of a random walk on a multidimensional integer lattice, with a one-point potential. We consider operators with potentials of a more general form that take nonzero values on a finite set of points of the integer lattice. The resolvent analysis of such operators has allowed us to study branching random walks with large deviations. We prove limit theorems on the asymptotic behavior of the Green function of transition probabilities. Special attention is paid to the case when the spectrum of the evolution operator of the mean numbers of particles contains a single eigenvalue. The results obtained extend the earlier studies in this field in such directions as the concept of a reaction front and the structure of a population inside a front and near its boundary. 
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S. A. Molchanov; E. B. Yarovaya. Large deviations for a~symmetric branching random walk on a~multidimensional lattice. Informatics and Automation, Branching processes, random walks, and related problems, Tome 282 (2013), pp. 195-211. http://geodesic.mathdoc.fr/item/TRSPY_2013_282_a15/

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