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Sommes connexes fibrées en cercles. (French) Zbl 0614.57021

Examples of nontrivial connected sums which support a free circle action are presented. It is shown that any five-dimensional compact simply connected manifold without boundary admits a free circle action if and only if it is torsion free.
Reviewer: H.Hösli

MSC:

57S15 Compact Lie groups of differentiable transformations
57S25 Groups acting on specific manifolds
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References:

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