Displaying similar documents to “Explicit definition of an exact measure for the semiflow of a first order partial differential equation”

Surface measures and convergence of the Ornstein-Uhlenbeck semigroup in Wiener spaces

Luigi Ambrosio, Alessio Figalli (2011)

Annales de la faculté des sciences de Toulouse Mathématiques

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We study points of density 1 / 2 of sets of finite perimeter in infinite-dimensional Gaussian spaces and prove that, as in the finite-dimensional theory, the surface measure is concentrated on this class of points. Here density 1 / 2 is formulated in terms of the pointwise behaviour of the Ornstein-Uhlembeck semigroup.