Lectures on Morse theory, old and new. (English) Zbl 0521.58019

Differential geometry and differential equations, Proc. 1980 Beijing Sympos., Vol. 1, 168-218 (1982).


58E05 Abstract critical point theory (Morse theory, Lyusternik-Shnirel’man theory, etc.) in infinite-dimensional spaces
58E10 Variational problems in applications to the theory of geodesics (problems in one independent variable)
53C22 Geodesics in global differential geometry
58E30 Variational principles in infinite-dimensional spaces


Zbl 0509.00015