Calabi-Yau Nichols algebras of Hecke type
  Let $R$ be a Nichols algebra of Hecke type. In this paper, we show that if $R$ is Noetherian and of finite global dimension, then $R$ has a rigid dualizing complex. We then give a necessary and sufficient condition for $R$ to be a Calabi-Yau algebra. 
Xiaolan Yu and Yinhuo Zhang
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