scientific article
zbMath0609.58002MaRDI QIDQ3749777
Publication date: 1986
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Palais-Smale conditionsymmetriesperiodic solutions of Hamiltonian systemsminimax methodssaddle point theorembifurcation problemsabstract critical point theoryMountain pass theoremsemilinear elliptic partial differential equationsindex theoriesdeformation theoremexistence of multiple critical points of symmetric functionals
Equations involving nonlinear operators (general) (47J05) Nonlinear elliptic equations (35J60) Abstract critical point theory (Morse theory, Lyusternik-Shnirel'man theory, etc.) in infinite-dimensional spaces (58E05) Dynamical aspects of finite-dimensional Hamiltonian and Lagrangian systems (37J99) Research exposition (monographs, survey articles) pertaining to global analysis (58-02) Variational problems in abstract bifurcation theory in infinite-dimensional spaces (58E07)
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