$L^p$ coarse Baum-Connes conjecture via $C_0$ coarse geometry

Abstract

In this paper, we investigate the $L^p$ coarse Baum-Connes conjecture for $p\in [1,\infty )$ via $C_0$ coarse structure, which is a refinement of the bounded coarse structure on a metric space. We prove that the $C_0$ version of the $L^p$ coarse Baum-Connes conjecture holds for a finite-dimensional simplicial complex equipped with a uniform spherical metric. Using this result, we construct an obstruction group for the $L^p$ coarse Baum-Connes conjecture. As an application, we show that the obstruction group vanishes under the assumption of finite asymptotic dimension, thereby providing a new proof of the $L^p$ coarse Baum-Connes conjecture in this case.

31 pages, to appear in Topology and its Applications