Three weak solutions for a class of Neumann boundary value systems involving the (p1,...,pn)-Laplacian

Abstract

In this paper, we establish the existence of two intervals ofpositive real parameters $\lambda$ for which a class of Neumannboundary value equations involving the (p1,...,pn)-Laplacianadmits three weak solutions, whose norms are uniformly bounded withrespect to $\lambda$ belonging to one of the two intervals. Theapproach is based on variational methods.