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Qualitative Phenomena for Some Classes of Quasilinear Elliptic Equations with Multiple Resonance

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Abstract

We consider nonlinear nonhomogeneous Dirichlet problems driven by the sum of a p-Laplacian and a Laplacian. The hypotheses on the reaction term incorporate problems resonant at both ±∞ and zero. We consider both cases p>2 and 1<p<2 (singular case) and we prove four multiplicity theorems producing three or four nontrivial solutions. For the case p>2 we provide precise sign information for all the solutions. Our approach uses critical point theory, truncation and comparison techniques, Morse theory and the Lyapunoff-Schmidt reduction method.

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Acknowledgements

The authors wish to thank the two referees for their corrections and remarks that improved the paper considerably. V. Rădulescu acknowledges the support through Grant CNCS PCE-47/2011.

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Correspondence to Vicenţiu D. Rădulescu.

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Papageorgiou, N.S., Rădulescu, V.D. Qualitative Phenomena for Some Classes of Quasilinear Elliptic Equations with Multiple Resonance. Appl Math Optim 69, 393–430 (2014). https://doi.org/10.1007/s00245-013-9227-z

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