Critical point theory and the minimax principle. (English) Zbl 0212.28902
Global Analysis, Proc. Sympos. Pure Math. 15, 185-212 (1970).
MSC:
| 58E05 | Abstract critical point theory (Morse theory, Lyusternik-Shnirel’man theory, etc.) in infinite-dimensional spaces |
| 57R70 | Critical points and critical submanifolds in differential topology |
