Variational–hemivariational inequalities with small perturbations of nonhomogeneous Neumann boundary conditions

In this paper variational–hemivariational inequalities with nonhomogeneous Neumann boundary conditions are investigated. Under an appropriate oscillating behavior of the nonlinear term, the existence of infinitely many solutions to this type of problems, even under small perturbations of nonhomogeneous Neumann boundary conditions, is established.