Symmetry groups of four-manifolds

Michael P. McCooey

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arXiv · math/9907180

Symmetry groups of four-manifolds

Michael P. McCooey

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Abstract

If a (possibly finite) compact Lie group acts effectively, locally linearly, and homologically trivially on a closed, simply-connected four-manifold with second Betti number at least three, then it must be isomorphic to a subgroup of S^1 x S^1, and the action must have nonempty fixed-point set. Our results strengthen and complement recent work by Edmonds, Hambleton and Lee, and Wilczynski, among others. Our tools include representation theory, finite group theory, and Borel equivariant cohomology.

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BibTeX RIS

Michael P. McCooey. 2000-05-30. Symmetry groups of four-manifolds. https://arxiv.org/abs/math/9907180

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