Noncommutative residue invariants for CR and contact manifolds
Differential Geometry
2008-02-12 v4 Complex Variables
Abstract
In this paper we produce several new invariants for CR and contact manifolds by looking at the noncommutative residue traces of various geometric projections. In the CR setting these operators arise from the Kohn-Rossi complex and include the Szeg\"o projections on forms. In the contact setting they stem from the generalized Szeg\"o projections at arbitrary integer levels of Epstein-Melrose and from the contact complex of Rumin. In particular, we recover and extend recent results of Hirachi and Boutet de Monvel and answer a question of Fefferman.
Cite
@article{arxiv.math/0510061,
title = {Noncommutative residue invariants for CR and contact manifolds},
author = {Raphael Ponge},
journal= {arXiv preprint arXiv:math/0510061},
year = {2008}
}
Comments
v4: new CR invariants with coefficients in CR holomorphic vector bundles + more comments about computation of the invariants + new title; 32 pages