A descent principle for the Dirac dual Dirac method
算子代数
2015-10-23 v2 K理论与同调
摘要
Let G be a torsion free discrete group with a finite dimensional classifying space BG. We show that G has a dual Dirac morphism if and only if a certain coarse (co)-assembly map is an isomorphism. Hence the existence of a dual Dirac morphism for such G is a metric, that is, coarse, invariant of G. We obtain similar results for groups with torsion. The framework that we develop is also suitable for studying the Lipschitz and proper Lipschitz cohomology of Connes, Gromov and Moscovici.
引用
@article{arxiv.math/0405388,
title = {A descent principle for the Dirac dual Dirac method},
author = {Heath Emerson and Ralf Meyer},
journal= {arXiv preprint arXiv:math/0405388},
year = {2015}
}