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math.QA1998
Certain generating subspaces for vertex operator algebras
Martin Karel, Haisheng Li
We study minimal generating subspaces of "weak PBW type" for vertex operator algebras that satisfy a certain condition on the grading, and we develop a procedure for finding such s…
math.QA1998
Some finiteness properties of regular vertex operator algebras
Haisheng Li
We give a natural extension of the notion of the contragredient module for a vertex operator algebra. By using this extension we prove that for regular vertex operator algebras, Zh…