Survey on aspherical manifolds

Details Survey on aspherical manifolds Survey on aspherical manifolds

2009-02-14

arxiv.org/abs/0902.2480v3

Mathematics

Geometric Topology

22 pages, implemented the suggestion of the referee, to appear in the Proceedings of the 5-th ECM, Amsterdam (2008)

Scientific paper

This is a survey on known results and open problems about closed aspherical manifolds, i.e., connected closed manifolds whose universal coverings are contractible. Many examples come from certain kinds of non-positive curvature conditions. The property aspherical which is a purely homotopy theoretical condition implies many striking results about the geometry and analysis of the manifold or its universal covering, and the ring theoretic properties and the K- and L-theory of the group ring associated to its fundamental group. The Borel Conjecture predicts that closed aspherical manifolds are topologically rigid. The article contains new results about product decompositions of closed aspherical manifolds and an announcement of a result joint with Arthur Bartels and Shmuel Weinberger about hyperbolic groups with spheres of dimension greater or equal to six as boundary. At the end we describe (winking) our universe of closed manifolds.

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