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Finite group actions on 4-manifolds

Part of: Topological manifolds Differential topology

Published online by Cambridge University Press:  09 April 2009

Yong Seung Cho
Yong Seung Cho
Affiliation:
Department of Mathematics, Ewha Women's University, Seoul 120-750, Korea e-mail: yescho@mm.ewha.ac.kr
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Abstract

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Let X be a closed, oriented, smooth 4-manifold with a finite fundamental group and with a non-vanishing Seiberg-Witten invariant. Let G be a finite group. If G acts smoothly and freely on X, then the quotient X/G cannot be decomposed as X1#X2 with (Xi) > 0, i = 1, 2. In addition let X be symplectic and c1(X)2 > 0 and b+2(X) > 3. If σ is a free anti-symplectic involution on X then the Seiberg-Witten invariants on X/σ vanish for all spinc structures on X/σ, and if η is a free symplectic involution on X then the quotients X/σ and X/η are not diffeomorphic to each other.

Keywords

4-manifoldfinite group actionsymplecticspinc structureSeiberg-Witten invariant

MSC classification

Secondary: 57R55: Differentiable structures 57N13: Topology of $E^4$, $4$-manifolds 57S17: Finite transformation groups

Information

Type
Research Article
Information
Journal of the Australian Mathematical Society , Volume 66 , Issue 3 , June 1999 , pp. 287 - 296
Copyright
Copyright © Australian Mathematical Society 1999

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