Twisted Donaldson invariants
Differential Geometry
2023-06-22 v3 Geometric Topology
Operator Algebras
Abstract
Fundamental group of a manifold gives a deep effect on its underlying smooth structure. In this paper we introduce a new variant of the Donaldson invariant in Yang-Mills gauge theory from twisting by the Picard group of a four manifold in the case when the fundamental group is free abelian. We then generalize it to the general case of fundamental groups by use of the framework of non commutative geometry. We also verify that our invariant distinguishes smooth structures between some homeomorphic four manifolds.
Cite
@article{arxiv.1709.08861,
title = {Twisted Donaldson invariants},
author = {Tsuyoshi Kato and Hirofumi Sasahira and Hang Wang},
journal= {arXiv preprint arXiv:1709.08861},
year = {2023}
}
Comments
typos fixed, Rewrite Section 4 to reduce technicality