2 papers
math.QA2026
Deformation rigidity of some simple affine VOAs
Andrew R. Linshaw, Fei Qi
In this paper, we prove that simple affine vertex operator algebras with positive integral levels admit only trivial first-order deformations. Therefore, the deformation rigidity c…
math.QA2025
First-order deformations of freely generated vertex algebras
Vladimir Kovalchuk, Fei Qi
We solve the problem of how to classify the first-order vertex-algebraic deformations for any grading-restricted vertex algebra that is freely generated by homogeneous elements…