Abstract
We consider a nonlinear Robin problem driven by a general nonhomogeneous differential operator plus an indefinite potential term. The reaction is of generalized logistic type. Using variational tools we prove a multiplicity theorem producing three nontrivial solutions with sign information (positive, negative and nodal). In the particular case of (p, 2)-equations, employing also critical groups, we produce a second nodal solution. Our results extend earlier multiplicity results for coercive problems.
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Acknowledgements
The authors are immensely grateful to the reviewers for their careful reading and suggestions that brought substantial improvements to the manuscript.
Funding
This project was supported by the Natural Science Foundation of Guangxi Grants Nos. 2021GXNSFFA196004 and GKAD21220144, the NNSF of China Grant Nos. 12001478 and 12101143, the China Postdoctoral Science Foundation funded project No. 2022M721560, the European Union’s Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie grant agreement No. 823731 CONMECH, and National Science Center of Poland under Preludium Project No. 2017/25/N/ST1/00611.
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Bai, Y., Papageorgiou, N.S. & Zeng, S. Multiplicity Results for Nonlinear Nonhomogeneous Robin Problems with Indefinite Potential Term. Results Math 78, 134 (2023). https://doi.org/10.1007/s00025-023-01907-5
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DOI: https://doi.org/10.1007/s00025-023-01907-5
Keywords
- Nonlinear regularity
- nonlinear maximum principle
- constant sign solutions
- nodal solutions
- second deformation theorem
- critical groups
- indefinite potential function