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Small time asymptotics of diffusion processes

A. F. M. ter Elst, Derek W. Robinson, Adam Sikora

math.AParXiv:math/0601350

Abstract

We establish the short-time asymptotic behaviour of the Markovian semigroups associated with strongly local Dirichlet forms under very general hypotheses. Our results apply to a wide class of strongly elliptic, subelliptic and degenerate elliptic operators. In the degenerate case the asymptotics incorporate possible non-ergodicity.

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