116 citations · 1.7k across the 92 of their papers we have counts for
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Inertia and delocalized twisted cohomology
Ulrich Bunke, Markus Spitzweck, Thomas Schick
We show that the inertia stack of a topological stack is again a topological stack. We further observe that the inertia stack of an orbispace is again an orbispace. We show how a U…
Enlargeability and index theory: Infinite covers
Bernhard Hanke, Thomas Schick
In a previous paper, we showed nonvaninishing of the universal index elements in the K-theory of the maximal C*-algebras of the fundamental groups of enlargeable spin manifolds. Th…
Completions of countable non-standard models of Q
Peter Laubenheimer, Thomas Schick, Ulrich Stuhler
In this note, we study non-standard models of the rational numbers with countably many elements. These are ordered fields, and so it makes sense to complete them, using non-standar…
Groups with torsion, bordism and rho-invariants
Paolo Piazza, Thomas Schick
Let G be a discrete group, and let M be a closed spin manifold of dimension m>3 with pi_1(M)=G. We assume that M admits a Riemannian metric of positive scalar curvature. We discuss…
Sheaf theory for stacks in manifolds and twisted cohomology for S^1-gerbes
Ulrich Bunke, Thomas Schick, Markus Spitzweck
This is the first of a series of papers on sheaf theory on smooth and topological stacks and its applications. The main result of the present paper is the characterization of the t…