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 Electronic Communications in Probability > Vol. 11 (2006) > Paper 11 open journal systems 


A note on a.s. finiteness of perpetual integral functionals of difusions

Davar Khoshnevisan, University of Utah, Utah, U.S.A.
Paavo Salminen, AAbo Akademi University, AAbo, Finland
Marc Yor, Universit'e Pierre et Marie Curie, Paris, France


Abstract
In this note we use the boundary classification of diffusions in order to derive a criterion for the convergence of perpetual integral functionals of transient real-valued diffusions. We present a second approach, based on Khas'minskii's lemma, which is applicable also to spectrally negative L'evy processes. In the particular case of transient Bessel processes, our criterion agrees with the one obtained via Jeulin's convergence lemma.


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Pages: 108-117

Published on: July 6, 2006


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Electronic Communications in Probability. ISSN: 1083-589X