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THE BOGOMOLOV-PROKHOROV INVARIANT OF SURFACES AS EQUIVARIANT COHOMOLOGY

  • Shinder, Evgeny (School of Mathematics and Statistics University of Sheffield)
  • Received : 2016.08.17
  • Accepted : 2016.12.02
  • Published : 2017.09.30

Abstract

For a complex smooth projective surface M with an action of a finite cyclic group G we give a uniform proof of the isomorphism between the invariant $H^1(G,\;H^2(M,\;{\mathbb{Z}}))$ and the first cohomology of the divisors fixed by the action, using G-equivariant cohomology. This generalizes the main result of Bogomolov and Prokhorov [4].

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