Irremediably singular quantum branched covers
Quantum Algebra
2026-05-26 v1 Algebraic Topology
Functional Analysis
Operator Algebras
Abstract
We prove that the Natsume-Olsen non-commutative spheres dualize for rational deformation parameters to provide examples of quantum branched covers over their respective centers' maximal spectra, embeddable into locally trivial bundles precisely when said spheres are classical; this, despite the bundles in question being of finite type over dimensional strata. The proof of the noted rigidity phenomenon relies on the quantum analogue of the 3-sphere's Heegaard splitting as a pushout of two solid tori.
Cite
@article{arxiv.2605.24007,
title = {Irremediably singular quantum branched covers},
author = {Alexandru Chirvasitu},
journal= {arXiv preprint arXiv:2605.24007},
year = {2026}
}
Comments
9 pages + references