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math.QA2023
Lambda bracket and Intertwiners
Juan J. Villarreal
We describe the intertwiners between modules of a vertex algebra using the language of lambda bracket. We apply this formalism to obtain some classical results on conformal field t…
math.QA2023
The centre of the modular affine vertex algebra
Tomoyuki Arakawa, Lewis Topley, Juan J. Villarreal
The Feigin--Frenkel theorem states that, over the complex numbers, the centre of the universal affine vertex algebra at the critical level is an infinite rank polynomial algebra. T…