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  • Multiplicity of solutions f...
    Papageorgiou, Nikolaos; Rădulescu, Vicenţiu

    Transactions of the American Mathematical Society, December 1, 2015, 20151201, 2015-12-00, Letnik: 367, Številka: 12
    Journal Article

    é. We allow for resonance to occur with respect to a nonprincipal nonnegative eigenvalue, and we prove several multiplicity results. Our approach uses critical point theory, Morse theory and the reduction method (the Lyapunov-Schmidt method).>