Fučík, Svatopluk; Nečas, Jindřich; Souček, Jiří; Souček, Vladimír Strengthening upper bound for the number of critical levels of nonlinear functionals. (English) Zbl 0253.58006 Commentat. Math. Univ. Carol. 13, 297-310 (1972). Reviewer: B. Nowak Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 1 Document MSC: 58E05 Abstract critical point theory (Morse theory, Lyusternik-Shnirel’man theory, etc.) in infinite-dimensional spaces 49R05 Variational methods for eigenvalues of operators 35D30 Weak solutions to PDEs 47J05 Equations involving nonlinear operators (general) Citations:Zbl 0252.47072 × Cite Format Result Cite Review PDF Full Text: EuDML