Non-negative integral level affine lie algebra tensor categories and their associativity isomorphisms

R McRae - Communications in Mathematical Physics, 2016 - Springer
For a finite-dimensional simple Lie algebra gg, we use the vertex tensor category theory of
Huang and Lepowsky to identify the category of standard modules for the affine Lie algebra …

Kazama–Suzuki coset construction and its inverse

R Sato - Journal of Algebra, 2022 - Elsevier
We study the representation theory of the Kazama–Suzuki coset vertex operator
superalgebra associated to the pair of a complex simple Lie algebra and its Cartan …

Fusion rules for the triplet -algebra

H Nakano - arXiv preprint arXiv:2308.15954, 2023 - arxiv.org
We study the structure of fusion rules for the triplet $ W $-algebra $\mathcal {W} _ {p_+, p_-}
$. By using the vertex tensor category theory developed by Huang, Lepowsky and Zhang …

Quantum groups and Nichols algebras acting on conformal field theories

SD Lentner - arXiv preprint arXiv:1702.06431, 2017 - arxiv.org
We prove that certain screening operators in conformal field theory obey the algebra
relations of a corresponding Nichols algebra with diagonal braiding. Our result proves in …

Holomorphic symplectic fermions

A Davydov, I Runkel - Mathematische Zeitschrift, 2017 - Springer
Let V be the even part of the vertex operator super-algebra of r pairs of symplectic fermions.
Up to two conjectures, we show that V admits a unique holomorphic extension if r is a …

The non-semisimple Kazhdan-Lusztig category for affine at admissible levels

R McRae, J Yang - arXiv preprint arXiv:2312.01088, 2023 - arxiv.org
We show that Kazhdan and Lusztig's category $ KL^ k (\mathfrak {sl} _2) $ of modules for the
affine Lie algebra $\widehat {\mathfrak {sl}} _2 $ at an admissible level $ k $, equivalently …

Fusion in the entwined category of Yetter-Drinfeld modules of a rank-1 Nichols algebra

AM Semikhatov - Theoretical and Mathematical Physics, 2012 - Springer
In the braided context, we rederive a popular nonsemisimple fusion algebra from a Nichols
algebra. Together with the decomposition that we find for the product of simple Yetter …

Fusion rules for the Virasoro algebra of central charge 25

FO Hunziker - Algebras and Representation Theory, 2020 - Springer
Let F 25 F_25 be the family of irreducible lowest weight modules for the Virasoro algebra of
central charge 25 which are not isomorphic to Verma modules. Let L (25, 0) be the Virasoro …

Vertex operators for imaginary gl2 subalgebras of the Monster Lie algebra

D Addabbo, L Carbone, E Jurisich, M Khaqan… - Journal of Pure and …, 2024 - Elsevier
Abstract The Monster Lie algebra m is a quotient of the physical space of the vertex algebra
V= V♮⊗ V 1, 1, where V♮ is the Moonshine module vertex operator algebra of Frenkel …

On duality and extended chiral symmetry in the WZW model

J Fjelstad - Journal of Physics A: Mathematical and Theoretical, 2011 - iopscience.iop.org
Two chiral aspects of the WZW model in an operator formalism are investigated. First, the
meaning of duality, or conjugation, of primary fields is clarified. On a class of modules …