Hung-Lam Ching

collaborators

4 papers

math.QA2026

Lattice vertex algebras over a field of positive characteristic: degenerate cases

Robert L. Griess, Ching Hung Lam

A vertex operator algebra $V_{L}$ associated with a positive definite even lattice $L$ has a standard integral form, which we denote it by $V_{L, Z}$ . If $F$ is a field of c…

math.QA2026

Permutation orbifolds and simple current extensions

Ching Hung Lam, Nina Yu

In this article, we study permutation orbifolds and simple current extensions in the framework of vertex operator (super)algebras. We extend the construction of permutation-twisted…

math.QA2018

Cyclic orbifolds of lattice vertex operator algebras having group like fusions

Ching Hung Lam

Let $L$ be an even (positive definite) lattice and $g \in O (L)$ . In this article, we prove that the orbifold vertex operator algebra $V_{L}^{g^}$ has group-like fusion if and o…

math.QA2018

Inertia groups and uniqueness of holomorphic vertex operator algebras

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 holom…