Fast graphs for the random walker |
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Authors: | Bálint Virág |
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Institution: | (1) Department of Mathematics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. e-mail: balint@math.mit.edu; http://www-math.mit.edu/~balint, US |
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Abstract: | Consider the time T
oz
when the random walk on a weighted graph started at the vertex o first hits the vertex set z. We present lower bounds for T
oz
in terms of the volume of z and the graph distance between o and z. The bounds are for expected value and large deviations, and are asymptotically sharp. We deduce rate of escape results for
random walks on infinite graphs of exponential or polynomial growth, and resolve a conjecture of Benjamini and Peres.
Received: 31 October 2000 / Revised version: 5 January 2002 / Published online: 22 August 2002 |
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Keywords: | |
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