Poincare Complex Diagonals

Details Poincare Complex Diagonals Poincare Complex Diagonals

2006-11-01

arxiv.org/abs/math/0611036v2

Mathematics

Algebraic Topology

Fixed some references, minor typos and improved some formulations

Scientific paper

Let M be a Poincare duality space of dimension at least four. In this paper
we describe a complete obstruction to realizing the diagonal map M -> M x M by
a Poincare embedding. The obstruction group depends only on the fundamental
group and the parity of the dimension of M.

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