Some recollections from 30 years ago. (English) Zbl 0467.58012

Constructive approaches to mathematical models, Proc. Conf. in Honor of R. J. Duffin, Pittsburgh/Pa. 1978, 33-39 (1979).


58E05 Abstract critical point theory (Morse theory, Lyusternik-Shnirel’man theory, etc.) in infinite-dimensional spaces
01A60 History of mathematics in the 20th century
58-03 History of global analysis
57R70 Critical points and critical submanifolds in differential topology
57-03 History of manifolds and cell complexes


Zbl 0432.00021