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Semilinear Robin problems resonant at both zero and infinity

  • Nikolaos S. Papageorgiou and Vicenţiu D. Rădulescu EMAIL logo
Published/Copyright: June 17, 2017

Abstract

We consider a semilinear elliptic problem, driven by the Laplacian with Robin boundary condition. We consider a reaction term which is resonant at ± and at 0. Using variational methods and critical groups, we show that under resonance conditions at ± and at zero the problem has at least two nontrivial smooth solutions.

MSC 2010: 35J20; 35J60; 58E05

Communicated by Christopher D. Sogge


Funding statement: The second author acknowledges the support through a grant of the Romanian National Authority for Scientific Research and Innovation, CNCS-UEFISCDI, project number PN-III-P4-ID-PCE-2016-0130.

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Received: 2016-12-27
Revised: 2017-05-02
Published Online: 2017-06-17
Published in Print: 2018-01-01

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