1999/09/13 by Michael W. Davis, Boris Okun, Fangyang Zheng
Mathematics · #math.GT #math.DG #msc:57S30 #msc:53C20
published as Geom. Topol. 3 (1999), 303-330 · 28 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTVol3/paper13.abs.html
arxiv created 1999/09/13 · arxiv updated 2009/11/30
In this article, we generalize Eberlein's Rigidity Theorem to the singular case, namely, one of the spaces is only assumed to be a CAT(0) topological manifold. As a corollary, we get that any compact irreducible but locally reducible locally symmetric space of noncompact type does not admit a nonpositively curved (in the Aleksandrov sense) piecewise Euclidean structure. Any hyperbolic manifold, on the other hand, does admit such a structure.