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Precise asymptotics of some meeting times arising from the voter model on large random regular graphs

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arxiv 1711.00127 v4 pith:M7LHDSPH submitted 2017-10-31 math.PR

Precise asymptotics of some meeting times arising from the voter model on large random regular graphs

classification math.PR
keywords approximationsgraphsrandomexponentialformlargemeetingmodel
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abstract

We consider two independent stationary random walks on large random regular graphs of degree $k\geq 3$ with $N$ vertices. On these graphs, the exponential approximations of the meeting times are known to follow from existing methods and form a basis for the voter model's diffusion approximations. The main result of this note improves the exponential approximations to an explicit form such that the first moments are asymptotically equivalent to $N(k-1)/[2(k-2)]$.

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