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Borsuk-Ulam theorems for arbitrary \(S^ 1 \)actions and applications. (English) Zbl 0506.58010

MSC:
58E05 Abstract critical point theory (Morse theory, Lyusternik-Shnirel’man theory, etc.) in infinite-dimensional spaces
55N25 Homology with local coefficients, equivariant cohomology
57R70 Critical points and critical submanifolds in differential topology
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