Advances in Difference Equations (Jan 2011)

A Criterium for the Strict Positivity of the Density of the Law of a Poisson Process

  • Léandre Rémi

Journal volume & issue
Vol. 2011, no. 1
p. 803508

Abstract

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We translate in semigroup theory our result (Léandre, 1990) giving a necessary condition so that the law of a Markov process with jumps could have a strictly positive density. This result express, that we have to jump in a finite number of jumps in a "submersive" way from the starting point to the end point if the density of the jump process is strictly positive in . We use the Malliavin Calculus of Bismut type of (Léandre, (2008;2010)) translated in semi-group theory as a tool, and the interpretation in semi-group theory of some classical results of the stochastic analysis for Poisson process as, for instance, the formula giving the law of a compound Poisson process.