In this paper we prove the existence and uniqueness of entropy solution for a nonlinear periodic parabolic problem in the setting of Orlicz spaces represented by the following equation: ∂u/∂t+A(u) = f(x,t) where A is a Leray-Lions operator defined on a subset of W1,x 0 LM(QT) and f belongs to L1(QT).
Elidrissi et al. (Wed,) studied this question.