Restricted (2+1)-TQFTs supported by thickened and solid tori
Geometric Topology
2025-05-28 v1 Category Theory
Abstract
A faithful TQFT has recently been constructed, but the existence of a faithful TQFT remains an open question, that subsumes the hard problem of linearity of mapping class groups of surfaces. To circumvent the latter problem we construct a subcategory of the category of 3-cobordisms, containing disjoint unions of tori and simplest cobordisms between them. On this we define TQFTs that are able to distinguish pairs of torus bundles and lens spaces, previously shown not to be distinguishable by quantum invariants.
Keywords
Cite
@article{arxiv.2505.21373,
title = {Restricted (2+1)-TQFTs supported by thickened and solid tori},
author = {Dušan Đorđević and Danica Kosanović and Jovana Nikolić and Zoran Petrić},
journal= {arXiv preprint arXiv:2505.21373},
year = {2025}
}
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26 pages