On the two-dimensional singular stochastic viscous nonlinear wave equations release_4gs4hzzhafd23l3z2shlirluhe

Abstract

We study the stochastic viscous nonlinear wave equations (SvNLW) on 𝕋^2, forced by a fractional derivative of the space-time white noise ξ. In particular, we consider SvNLW with the singular additive forcing D^1/2ξ such that solutions are expected to be merely distributions. By introducing an appropriate renormalization, we prove local well-posedness of SvNLW. By establishing an energy bound via a Yudovich-type argument, we also prove global well-posedness of the defocusing cubic SvNLW. Lastly, in the defocusing case, we prove almost sure global well-posedness of SvNLW with respect to certain Gaussian random initial data.
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