Sven Möller

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math.QA2025

Character Identities Between Affine and Virasoro Vertex Operator Algebra Modules

Dražen Adamović, Sven Möller

The affine vertex operator algebras for $sl_{2}$ and the Virasoro minimal models are related by Drinfeld-Sokolov reduction and by the Goddard-Kent-Olive coset construction…

math.QA2024

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

César Galindo, Simon Lentner, Sven Möller

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

math.QA2024

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

César Galindo, Simon Lentner, Sven Möller

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…

Character Identities Between Affine and Virasoro Vertex Operator Algebra Modules

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

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