Some minimax theorems and applications to nonlinear partial differential equations. (English) Zbl 0466.58015

Nonlinear analysis, Collect. Pap. Honor E. H. Rothe, 161-177 (1978).


58E05 Abstract critical point theory (Morse theory, Lyusternik-Shnirel’man theory, etc.) in infinite-dimensional spaces
55M30 Lyusternik-Shnirel’man category of a space, topological complexity √† la Farber, topological robotics (topological aspects)
35J65 Nonlinear boundary value problems for linear elliptic equations
49J27 Existence theories for problems in abstract spaces
45G10 Other nonlinear integral equations


Zbl 0453.00023