The integral cohomology groups of configuration spaces of pairs of points in real projective spaces

Details The integral cohomology groups of configuration spaces of pairs of points in real projective spaces The integral cohomology groups of configuration spaces of pairs of points in real projective spaces

2010-04-06

arxiv.org/abs/1004.0746v3

Mathematics

Algebraic Topology

Published version: Morfismos Volumen 14, N\'umero 2, 2010

Scientific paper

We compute the integral homology and cohomology groups of configuration spaces of two distinct points on a given real projective space. The explicit answer is related to the (known multiplicative structure in the) integral cohomology---with simple and twisted coefficients---of the dihedral group of order 8 (in the case of unordered configurations) and the elementary abelian 2-group of rank 2 (in the case of ordered configurations). As an application, we complete the computation of the symmetric topological complexity of real projective spaces of dimension 2^i + d for d=0,1,2.

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