Abstract
In this paper we study the existence of solution for two kinds of hemivariational inequalities: the first of them is of elliptic type, the second one of hamiltonian type. In those problems the energy functional is indefinite, so the classical variational principles can’t be used in a direct way. The results are an application of two theorems of existence of critical points for non-differentiable functionals recently obtained.
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Barletta, G. Applications of two critical point results for non-differentiable indefinite functionals. Rend. Circ. Mat. Palermo 55, 323–352 (2006). https://doi.org/10.1007/BF02874774
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DOI: https://doi.org/10.1007/BF02874774