Multiplicity results for a perturbed elliptic Neumann problem. (English) Zbl 1207.35118

Summary: The existence of three solutions for elliptic Neumann problems with a perturbed nonlinear term depending on two real parameters is investigated. Our approach is based on variational methods.


35J25 Boundary value problems for second-order elliptic equations
35J20 Variational methods for second-order elliptic equations
35A01 Existence problems for PDEs: global existence, local existence, non-existence
35B20 Perturbations in context of PDEs
35B30 Dependence of solutions to PDEs on initial and/or boundary data and/or on parameters of PDEs
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