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Twisted ϕ-coordinated modules for vertex algebras and Zhu's correspondence theorem

2025/12/01 by Xu, Shun
#17B69 #FOS: Mathematics #Quantum Algebra (math.QA)

paper · doi:10.48550/arxiv.2512.01272

Abstract

Let V be a vertex algebra and g be an automorphism of V of order T. For any n, m ∈ (1/T)ℕ, we construct an Ag,n(V) - Ag,m(V)-bimodule Ag,n,m(V), where Ag,n(V) denotes the associative algebra constructed by the authors in \citeShun1. We introduce the notion of (1/T)ℕ-graded g-twisted ϕ-coordinated V-modules and prove that there exists a bijection between the simple Ag(V)-modules and the irreducible (1/T)ℕ-graded g-twisted ϕ-coordinated V-modules, where Ag(V)=Ag,0(V). We construct the universal enveloping algebra U(V[g]), showing that Ag(V) is subquotient of U(V[g]). When V is vertex operator algebra, we show that each Ag,n,m(V) is isomorphic to the Ag,n(V)-Ag,m(V)-bimodule Ag,n,m(V) constructed by Dong and Jiang~\citeDJ2. Also we prove that there exists a bijection between the irreducible admissible g-twisted V-modules and the irreducible (1/T)ℕ-graded g-twisted ϕ-coordinated V-modules.

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