Examples of noncompact nonpositively curved manifolds
arXiv:1711.03629 · doi:10.1112/blms.12484
Abstract
We give a simple construction of new, complete, finite volume manifolds of bounded, nonpositive curvature. These manifolds have ends that look like a mixture of locally symmetric ends of different ranks and their fundamental groups are not duality groups.
13 pages, 2 figures