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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(online) ISSN 0002-9939(print)


A Gysin sequence for semifree actions of $ {\bf S}\sp 3$

Author: Martin Saralegi
Journal: Proc. Amer. Math. Soc. 118 (1993), 1335-1345
MSC: Primary 55N33; Secondary 57S15
MathSciNet review: 1184085
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Abstract: In this work we shall consider smooth semifree (i.e., free outside the fixed point set) actions of $ {{\mathbf{S}}^3}$ on a manifold $ M$. We exhibit a Gysin sequence relating the cohomology of $ M$ with the intersection cohomology of the orbit space $ M/{{\mathbf{S}}^3}$. This generalizes the usual Gysin sequence associated with a free action of $ {{\mathbf{S}}^3}$.

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PII: S 0002-9939(1993)1184085-X
Keywords: Gysin sequence, intersection cohomology
Article copyright: © Copyright 1993 American Mathematical Society