Approximation and support theorem for a two space-dimensional wave equation

Annie Millet and Marta Sanz-Solé

We prove a characterization of the support of the law of the solution for a stochastic wave equation with two-dimensional space variable, driven by a noise white in time and correlated in space. The result is a consequence of an approximation theorem, in the convergence of probability, for equations obtained by smoothing the random noise. For some particular classes of coefficients, aproximation in the $L^p$ norm, for $p\geq 1$ is also proved.