The mountain pass theorem: theme and variations. (English) Zbl 0493.58007

Differential equations, Proc., Sao Paulo 1981, Lect. Notes Math. 957, 237-271 (1982).


58E05 Abstract critical point theory (Morse theory, Lyusternik-Shnirel’man theory, etc.) in infinite-dimensional spaces
58E07 Variational problems in abstract bifurcation theory in infinite-dimensional spaces
35B32 Bifurcations in context of PDEs
35J65 Nonlinear boundary value problems for linear elliptic equations
49J35 Existence of solutions for minimax problems


Zbl 0484.00007