Transition Semigroups of Banach Space Valued Ornstein-Uhlenbeck Processes
Abstract
Description
We investigate the transition semigroup of the solution to a stochastic evolution equation $dX(t) = AX(t)dt +dW_H(t)$, $t\ge 0,$ where $A$ is the generator of a $C_0$-semigroup $S$ on a separable real Banach space $E$ and $W_H$ is cylindrical white noise with values in a real Hilbert space $H$ which is continuously embedded in $E$. Various properties of these semigroups, such as the strong Feller property, the spectral gap property, and analyticity, are characterized in terms of the behaviour of $S$ in $H$. In particular we investigate the interplay between analyticity of the transition semigroup, $S$-invariance of $H$, and analyticity of the restricted semigroup $S_H$.
This is an update of the published version of the paper. The proof of Theorem 9.1 has been corrected
This is an update of the published version of the paper. The proof of Theorem 9.1 has been corrected