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math.GT2011
Topological Classification of Multiaxial U(n)-Actions
Sylvain Cappell, Shmuel Weinberger, Min Yan
A U(n)-manifold is multiaxial if the isotropy groups are always conjugate to unitary subgroups. The classification and the concordance of such manifolds have been studied by Davis,…
math.GT2011★ 7 cited
Closed Aspherical Manifolds with Center
Sylvain Cappell, Shmuel Weinberger, Min Yan
We show that in all dimensions >7 there are closed aspherical manifolds whose fundamental groups have nontrivial center but do not possess any topological circle actions. This disp…