A groupoid approach to the Wodzicki residue and the Kontsevich–Vishik trace

Abstract

Building on the work of Debord and Skandalis, van Erp and Yuncken introduced a groupoid approach to pseudo-differential operators which has various advantages over the classical approach using Hörmander’s symbolic calculus. In a recent work by Couchet and Yuncken, they showed that for pseudo-differential operators of order $-\dim (M)$ acting on a smooth manifold $M$ the Wodzicki residue can be naturally obtained from van Erp and Yuncken’s approach. In this short note, we extend their work to pseudo-differential operators of any order. We also describe of the Kontsevich–Vishik trace.