English

Relation between bicrossed products and crossed extensions of fusion categories

Quantum Algebra 2025-09-22 v2

Abstract

We show that all crossed extensions defined by Natale can be recovered as duals of bicrossed products of fusion categories. As an application, we prove that any exact factorization between a pointed fusion category vecG\operatorname{vec}_G and a fusion category C\mathcal{C} can be realized as a bicrossed product vecGC\operatorname{vec}_G\bowtie \mathcal{C}.

Keywords

Cite

@article{arxiv.2507.08562,
  title  = {Relation between bicrossed products and crossed extensions of fusion categories},
  author = {Monique Müller and Héctor Martín Peña Pollastri and Julia Plavnik},
  journal= {arXiv preprint arXiv:2507.08562},
  year   = {2025}
}

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12 pages