This monograph presents fundamental methods and topics in nonlinear analysis and their
efficient application to nonlinear boundary value problems for elliptic equations. The book is …

We consider a nonlinear Neumann problem driven by a nonhomogeneous quasilinear
degenerate elliptic differential operator $\operatorname {div} a (x,\nabla u) $, a special case …

We study a nonlocal Neumann problem driven by a nonhomogeneous elliptic differential
operator. The reaction term is a nonlinearity function that exhibits p-superlinear growth but …

We consider a nonlinear Neumann eigenvalue problem driven by a possibly
nonhomogeneous differential operator which incorporates as a special case the p …

We consider a nonlinear Neumann problem driven by the p-Laplacian differential operator
and having a p-superlinear nonlinearity. Using truncation techniques combined with the …

We consider nonlinear Neumann problems driven by p-Laplacian-type operators which are
not homogeneous in general. We prove an existence and a multiplicity result for such …

In this paper we consider a nonlinear Neumann problem driven by the p-Laplacian with a
nonsmooth potential (hemivariational inequality). Using minimax methods based on the …

In this paper we first conduct a study of the spectrum of the negative p-Laplacian with
Neumann boundary conditions. More precisely we investigate the first nonzero eigenvalue …

We study nonlinear parametric Neumann problems driven by the p-Laplacian differential
operator. We examine the existence and multiplicity of solutions and of positive solutions …

We consider a nonlinear Neumann problem driven by a nonhomogeneous nonlinear
differential operator and with a reaction which is $(p-1) $-superlinear without necessarily …