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We provide a rigorous mathematical foundation to the study of strongly rational, holomorphic vertex operator algebras V of central charge c = 8, 16 and 24 initiated by Schellekens. If c = 8 or 16 we show that V is isomorphic to a lattice…

Quantum Algebra · Mathematics 2007-05-23 C. Dong , G. Mason

This article is a continuation of our work on the classification of holomorphic framed vertex operator algebras of central charge 24. We show that a holomorphic framed VOA of central charge 24 is uniquely determined by the Lie algebra…

Quantum Algebra · Mathematics 2012-09-24 Ching Hung Lam , Hiroki Shimakura

We continue our program on classification of holomorphic vertex operator algebras of central charge $24$. In this article, we show that there exists a unique strongly regular holomorphic VOA of central charge $24$, up to isomorphism, if its…

Quantum Algebra · Mathematics 2018-04-10 Ching Hung Lam , Hiroki Shimakura

In this paper, a holomorphic vertex operator algebra $U$ of central charge 24 with the weight one Lie algebra $A_{8,3}A_{2,1}^2$ is proved to be unique. Moreover, a holomorphic vertex operator algebra of central charge 24 with weight one…

Quantum Algebra · Mathematics 2018-02-27 Ching Hung Lam , Xingjun Lin

Odd, positive-definite, integral, unimodular lattices N of rank 24 were classified by Borcherds. There are 273 isometry classes of such lattices. Associated to them are vertex superalgebras $V_N$ of central charge c=24. We show that at…

Quantum Algebra · Mathematics 2025-10-13 Gerald Höhn , Geoffrey Mason

We describe the automorphism groups of all holomorphic vertex operator algebras of central charge $24$ with non-trivial weight one Lie algebras by using their constructions as simple current extensions. We also confirm a conjecture of G.…

Quantum Algebra · Mathematics 2023-02-27 Koichi Betsumiya , Ching Hung Lam , Hiroki Shimakura

In this article, we describe a construction of a holomorphic vertex operator algebras of central charge $24$ whose weight one Lie algebra has type $A_{6,7}$.

Quantum Algebra · Mathematics 2016-09-21 Ching Hung Lam , Hiroki Shimakura

In 1993, Schellekens obtained a list of possible 71 Lie algebras of holomorphic vertex operator algebras with central charge 24. However, not all cases are known to exist. The aim of this article is to construct new holomorphic vertex…

Quantum Algebra · Mathematics 2014-02-26 Ching Hung Lam , Hiroki Shimakura

In this article, we develop a general technique for proving the uniqueness of holomorphic vertex operator algebras based on the orbifold construction and its "reverse" process. As an application, we prove that the structure of a strongly…

Quantum Algebra · Mathematics 2019-05-14 Ching Hung Lam , Hiroki Shimakura

We prove that all nice holomorphic vertex operator superalgebras (VOSAs) with central charge at most 24 and with non-trivial odd part are unitary, apart from the hypothetical ones arising as fake copies of the shorter moonshine VOSA or of…

Quantum Algebra · Mathematics 2025-11-18 Tiziano Gaudio

We classify strongly homotopy Lie algebras - also called L-infinity algebras - of one even and two odd dimensions, which are related to $2|1$-dimensional $Z_2$-graded Lie algebras. What makes this case interesting is that there are many…

Quantum Algebra · Mathematics 2007-05-23 Alice Fialowski , Michael Penkava

The vertex operator algebra structure of a strongly regular holomorphic vertex operator algebra $V$ of central charge $24$ is proved to be uniquely determined by the Lie algebra structure of its weight one space $V_1$ if $V_1$ is a Lie…

Quantum Algebra · Mathematics 2017-01-05 Kazuya Kawasetsu , Ching Hung Lam , Xingjun Lin

We classify the self-dual (or holomorphic) vertex operator superalgebras of central charge 24, or in physics parlance the purely left-moving, fermionic 2-dimensional conformal field theories with just one primary field. There are exactly…

Quantum Algebra · Mathematics 2024-03-27 Gerald Höhn , Sven Möller

Here, in every simple finite-dimensional vectorial Lie superalgebra considered with the standard grading where every indeterminate is of degree 1, the maximal graded solvable subalgebras are classified over $\mathbb{C}$.

Representation Theory · Mathematics 2025-06-25 Irina Shchepochkina

In this article, we construct three new holomorphic vertex operator algebras of central charge $24$ using the $\mathbb{Z}_2$-orbifold construction associated to inner automorphisms. Their weight one subspaces has the Lie algebra structures…

Quantum Algebra · Mathematics 2016-01-20 Ching Hung Lam , Hiroki Shimakura

We prove that all holomorphic vertex operator algebras of central charge $24$ with non-trivial weight one subspaces are unitary. The main method is to use the orbifold construction of a holomorphic VOA $V$ of central charge $24$ directly…

Quantum Algebra · Mathematics 2023-03-22 Ching Hung Lam

In this article, we study orbifold constructions associated with the Leech lattice vertex operator algebra. As an application, we prove that the structure of a strongly regular holomorphic vertex operator algebra of central charge $24$ is…

Quantum Algebra · Mathematics 2017-06-27 Ching Hung Lam , Hiroki Shimakura

It is shown that any simple, rational and C_2-cofinite vertex operator algebra whose weight 1 subspace is zero, the dimension of weight 2 subspace is greater than or equal to 2 and with central charge c=1, is isomorphic to L(1/2,0)\otimes…

Quantum Algebra · Mathematics 2015-05-13 Chongying Dong , Cuipo Jiang

We study graded symmetric algebras, which are the symmetric monoids in the monoidal category of vector spaces graded by a group. We show that a finite dimensional graded semisimple algebra is graded symmetric. The center of a symmetric…

Rings and Algebras · Mathematics 2017-07-24 Sorin Dascalescu , Constantin Nastasescu , Laura Nastasescu

We prove a dimension formula for orbifold vertex operator algebras of central charge 24 by automorphisms of order $n$ such that $\Gamma_0(n)$ is a genus zero group. We then use this formula together with the inverse orbifold construction…

Quantum Algebra · Mathematics 2018-05-15 Jethro van Ekeren , Sven Möller , Nils R. Scheithauer
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