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  • Resonant Robin problems with indefinite and unbounded potential
    Papageorgiou, Nikolaos, 1958- ; Smyrlis, George
    We study a semilinear Robin problem with an indefinite and unbounded potential and a reaction term which asymptotically at ▫$\pm \infty$▫ is resonant with respect to any nonprincipal nonnegative ... eigenvalue. We prove two multiplicity theorems producing three and four nontrivial solutions respectively. Our approach uses variational methods based on the critical point theory, truncation and perturbation techniques, and Morse theory (critical groups).
    Vir: Topological Methods in Nonlinear Analysis. - ISSN 1230-3429 (Vol. 49, no. 1, 2017, str. 51-74)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2017
    Jezik - angleški
    COBISS.SI-ID - 17803609