Well-posedness of renormalized solutions for a stochastic $p$-Laplace equation with $L^1$-initial data

Abstract

We consider a p-Laplace evolution problem with stochastic forcing on a bounded domain D ⊂ R d with homogeneous Dirichlet boundary conditions for 1 < p < ∞. The additive noise term is given by a stochastic integral in the sense of Itô. The technical difficulties arise from the merely integrable random initial data u 0 under consideration. Due to the poor regularity of the initial data, estimates in W 1,p 0 (D) are available with respect to truncations of the solution only and therefore well-posedness results have to be formulated in the sense of generalized solutions. We extend the notion of renormalized solution for this type of SPDEs, show well-posedness in this setting and study the Markov properties of solutions.