Infinitely many sign-changing solutions for p-Laplacian Neumann problems with indefinite weight ✩

Abstract We consider nonlinear Neumann problems driven by p -Laplacian plus an indefinite potential. Using critical point theory, coupled with suitable truncation techniques, we show that the problem has infinitely many sign-changing solutions. The interesting point is that we do not impose any restrictions to the behavior of the reaction term f at infinity.