A Geometric Characterization of the Dirac Dual Dirac Method
نویسنده
چکیده
Let G be a discrete, torsion free group with a finite dimensional classifying space BG. We show that the existence of a γ-element for such G is a metric, that is, coarse, invariant of G. We also obtain results for groups with torsion. The method of proof involves showing that a group G possesses a γ-element if and only if a certain coarse (co)-assembly map is an isomorphism.
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تاریخ انتشار 2003