Sheets and associated varieties of affine vertex algebras
  We show that sheet closures appear as associated varieties of affine vertex algebras. Further, we give new examples of non-admissible affine vertex algebras whose associated variety is contained in the nilpotent cone. We also prove some conjectures from our previous paper and give new examples of lisse affine W-algebras. 
Tomoyuki Arakawa and Anne Moreau
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