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Gillis' Random Walks on Graphs

Published online by Cambridge University Press:  14 July 2016

Nadine Guillotin-Plantard*
Affiliation:
Université Claude Bernard Lyon 1
*
∗ Postal address: Université Claude Bernard Lyon 1, LaPCS, 50, avenue Tony Garnier, Domaine de Gerland, 69366 Lyon Cedex 07, France. Email address: nadine.guillotin@univ-lyon1.fr
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Abstract

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We consider a random walker on a d-regular graph. Starting from a fixed vertex, the first step is a unit step in any one of the d directions, with common probability 1/d for each one. At any later step, the random walker moves in any one of the directions, with probability q for a reversal of direction and probability p for any other direction. This model was introduced and first studied by Gillis (1955), in the case when the graph is a d-dimensional square lattice. We prove that the Gillis random walk on a d-regular graph is recurrent if and only if the simple random walk on the graph is recurrent. The Green function of the Gillis random walk will be also given, in terms of that of the simple random walk.

Information

Type
Short Communications
Copyright
© Applied Probability Trust 2005