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February 2001 Vertex-reinforced random walk on arbitrary graphs
Stanislav Volkov
Ann. Probab. 29(1): 66-91 (February 2001). DOI: 10.1214/aop/1008956322


Vertex-reinforced random walk (VRRW), defined by Pemantle, is a random process in a continuously changing environment which is more likely to visit states it has visited before. We consider VRRW on arbitrary graphs and show that on almost all of them, VRRW visits only finitely many vertices with a positive probability. We conjecture that on all graphs of bounded degree, this happens with probability 1, and provide a proof only for trees of this type.

We distinguish between several different patterns of localization and explicitly describe the long-run structure of VRRW, which depends on whether a graph contains triangles or not.

While the results of this paper generalize those obtained by Pemantle and Volkov for Z1, ideas of proofs are different and typically based on a large deviation principle rather than a martingale approach.


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Stanislav Volkov. "Vertex-reinforced random walk on arbitrary graphs." Ann. Probab. 29 (1) 66 - 91, February 2001.


Published: February 2001
First available in Project Euclid: 21 December 2001

zbMATH: 1031.60089
MathSciNet: MR1825142
Digital Object Identifier: 10.1214/aop/1008956322

Keywords: large deviation principle , Local time , Martingales , Polýa urn model , Vertex-reinforced random walk

Rights: Copyright © 2001 Institute of Mathematical Statistics


Vol.29 • No. 1 • February 2001
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