A new invariant for sigma models
Abstract
Description
We introduce a new invariant for foliations using the even pairing between K-homology and cyclic homology and discuss some possible applications in physics.
45 pages, extended version. to appear in Commun. Math. Phys., communicated with A. Connes
45 pages, extended version. to appear in Commun. Math. Phys., communicated with A. Connes