Yiyi Zhu

collaborators

3 papers

math.QA2026

Finiteness and Construction of Internal Hom for Vertex Operator Algebras

Chao Yang, Yiyi Zhu

Let $V$ be a vertex operator algebra, and let $W^{1}$ and $W^{2}$ be restricted $V$ -modules. We construct a generalized $V$ -module $H (W^{1}, W^{2})$ characterized by canonical un…

math.QA2025

Cofiniteness for Twisted Fusion Products in Vertex Operator Algebra Theory

Chao Yang, Yiyi Zhu

Let $V$ be a vertex operator algebra equipped with two commuting finite-order automorphisms $g_{1}$ and $g_{2}$ , and set $g_{3} = g_{1} g_{2}$ . For $k = 1, 2, 3$ , let $W^{k}$ be a $g_{k}$ -twiste…

math.QA2025

Bimodules over twisted Zhu algebras and twisted fusion rules theorem for vertex operator algebras

Yiyi Zhu

Let $V$ be a strongly rational vertex operator algebra, and let $g_{1}, g_{2}, g_{3}$ be three commuting finitely ordered automorphisms of $V$ such that $g_{1} g_{2} = g_{3}$ and $g_{i}^{T} = 1$ for $i…