Improving Monte Carlo simulations by Dirichlet forms

preprint2013arXivOpen access

Abstract

Equipping the probability space with a local Dirichlet form with square field operator Γand generator A allows to improve Monte Carlo simulations of expectations and densities as soon as we are able to simulate a random variable X together with Γ[X] and A[X]. We give examples on the Wiener space, on the Poisson space and on the Monte Carlo space. When X is real-valued we give an explicit formula yielding the density at the speed of the law of large numbers.

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