Electron. J. Differential Equations, Vol. 2023 (2023), No. 23, pp. 1-11.

Prescribed energy saddle-point solutions of nonlinear indefinite problems

Yavdat Il'yasov, Edcarlos D. Silva, Maxwell L. Silva

Abstract:
A minimax variational method for finding mountain pass-type solutions with prescribed energy levels is introduced. The method is based on application of the Linking Theorem to the energy-level nonlinear Rayleigh quotients which critical points correspond to the solutions of the equation with prescribed energy. An application of the method to nonlinear indefinite elliptic problems with nonlinearities that does not satisfy the Ambrosetti-Rabinowitz growth conditions is also presented.

Submitted December 5, 2022. Published March 4, 2023
Math Subject Classifications: 35G15, 35G20, 35G25, 35G30.
Key Words: Indefinite problems; linking theorems; Rayleigh quotient.
DOI: https://doi.org/10.58997/ejde.2023.23

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Yavdat Il'yasov
Institute of Mathematics with Computing Centre of Ufa
Federal Research Centre, RAS, Ufa, Russia
email: ilyasov02@gmail.com
Edcarlos Domingos da Silva
Department of Mathematics
Federal University of Goiás 74001-970
Goiânia - GO, Brazil
email: eddomingos@hotmail.com
Maxwell Lizete da Silva
Department of Mathematics
Federal University of Goiás 74001-970
Goiânia - GO, Brazil
email: maxwelllizete@gmail.com

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