Critical points when there is no saddle point geometry

DOI10.12775/TMNA.1995.047zbMath0864.58007OpenAlexW2587493217MaRDI QIDQ1922770

Schechter, Martin

Publication date: 6 July 1997

Published in: Topological Methods in Nonlinear Analysis (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.12775/tmna.1995.047

zbMATH Keywords

critical pointsaddle pointelliptic boundary value problemslinking subsets

Mathematics Subject Classification ID

Optimality conditions for problems involving partial differential equations (49K20) Nonlinear boundary value problems for linear elliptic equations (35J65) Equations involving nonlinear operators (general) (47J05) Existence of solutions for minimax problems (49J35) Abstract critical point theory (Morse theory, Lyusternik-Shnirel'man theory, etc.) in infinite-dimensional spaces (58E05) Variational methods for elliptic systems (35J50)

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Superlinear elliptic boundary value problems ⋮ Sign-changing critical points from linking type theorems

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