Ring structures of mod p equivariant cohomology rings and ring homomorphisms between them

Document Type : Research Paper

Authors

1 College of Mathematics and Information Science, Hebei Normal University, Yuhua Road 113, Shijiazhuang 050016, P. R. China

2 College of Mathematics and Information Science, Hebei Normal University, Yuhua Road 113, Shijiazhuang 050016, P. R. China

Abstract

In this paper, we consider a class of connected oriented (with respect to Z/p) closed G-manifolds with a non-empty finite fixed point set, each of which is G-equivariantly formal, where G = Z/p and p is an odd prime. Using localization theorem and equivariant index, we give an explicit description of the mod p equivariant cohomology ring of such a G-manifold in terms of algebra. This makes it possible to determine the number of equivariant cohomology rings (up to isomorphism) of such 2-dimensional G-manifolds. Moreover, we obtain a description of the ring homomorphism between equivariant cohomology rings of such two G-manifolds induced by a G-equivariant map, and show a characterization of the ring homomorphism.

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Bulletin of the Iranian Mathematical Society
Volume 38, Issue 2 - Serial Number 2
July and August 2012
Pages 529-542

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History

  • Receive Date: 18 October 2010
  • Revise Date: 23 February 2011
  • Accept Date: 23 February 2011

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