Homologically Trivial Group Actions on 4-Manifolds
classification
🧮 math.GT
keywords
grouphomologicallymanifoldactingactionsarbitrarybetticlosed
read the original abstract
It is proved that an arbitrary finite group acting locally linearly, homologically trivially, and pseudofreely on a closed, simply connected 4-manifold must in fact be cyclic and act semifreely, provided the second betti number of the manifold is at least three.
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