Flat connections in three-manifolds and classical Chern-Simons invariant
Abstract
A general method for the construction of smooth flat connections on 3-manifolds is introduced. The procedure is strictly connected with the deduction of the fundamental group of a manifold M by means of a Heegaard splitting presentation of M. For any given matrix representation of the fundamental group of M, a corresponding flat connection A on M is specified. It is shown that the associated classical Chern-Simons invariant assumes then a canonical form which is given by the sum of two contributions: the first term is determined by the intersections of the curves in the Heegaard diagram, and the second term is the volume of a region in the representation group which is determined by the representation of pi_1(M) and by the Heegaard gluing homeomorphism. Examples of flat connections in topologically nontrivial manifolds are presented and the computations of the associated classical Chern-Simons invariants are illustrated.
Keywords
Cite
@article{arxiv.1710.09629,
title = {Flat connections in three-manifolds and classical Chern-Simons invariant},
author = {Enore Guadagnini and Philippe Mathieu and Frank Thuillier},
journal= {arXiv preprint arXiv:1710.09629},
year = {2018}
}
Comments
26 pages, 13 figures