Gauge theory and foliations I; germ cords versus quantum cords

Abstract

We apply gauge theory to study the space $F_k(M)$ of smooth codimension-$k$ framed foliations on a smooth manifold $M$. The quotient of Maurer-Cartan elements by the action of an infinite dimensional non-abelian gauge groupoid forms a moduli space, which contains $F_k(M)$ as a subspace. The notion of holonomy is naturally extended to this moduli space and the cohomology theory associated with points of this moduli space which correspond to non-singular foliations coincides with Bott cohomology. The quotient of the moduli space under concordance is identified as the space of homotopy classes of maps to the classifying spaces $B{\Gamma }_k^g$ and $B{\Gamma }_k^q$. While $B{\Gamma }^g$ is a classic and has been studied since Haefliger, $B{\Gamma }^q$ (which is a quotient of $B{\Gamma }^g$) carries a simpler topology and offers a rival theory.