C'esar Galindo

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20242026

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math.QA2026

Cocentral Split Abelian Hopf Algebra Extensions from Crossed Cocycles

CÃ©sar Galindo, Giovanny Mora

We study cocentral algebra-split abelian Hopf algebra extensions over an algebraically closed field of characteristic zero for a fixed action of a group on a finite abelian group.…

math.QA2026

Modular $Z_{2}$ -Crossed Tambara-Yamagami-like Categories for Even Groups

CÃ©sar Galindo, César Galindo, Simon Lentner +2

We explicitly construct nondegenerate braided $Z_{2}$ -crossed tensor categories of the form $Vect_{Γ} \oplus Vect_{Γ/2Γ}$ . They are $Z_{2}$ -…

math.QA2025

Zestings of Hopf Algebras

We extend the previously established zesting techniques from fusion categories to general tensor categories. In particular we consider the category of comodules over a Hopf algebra…

math.QA2024

Computing $G$ -Crossed Extensions and Orbifolds of Vertex Operator Algebras

In this article, we develop tools for computing $G$ -crossed extensions of braided tensor categories. Their equivariantisations appear as categories of modules of fixed-point subalg…

Cocentral Split Abelian Hopf Algebra Extensions from Crossed Cocycles

Modular Z2​-Crossed Tambara-Yamagami-like Categories for Even Groups

Zestings of Hopf Algebras

Computing G-Crossed Extensions and Orbifolds of Vertex Operator Algebras

Modular $Z_{2}$ -Crossed Tambara-Yamagami-like Categories for Even Groups

Computing $G$ -Crossed Extensions and Orbifolds of Vertex Operator Algebras