Calabi-Yau property under monoidal Morita-Takeuchi equivalence
  Let $H$ and $L$ be two Hopf algebras such that their comodule categories are monoidal equivalent. We prove that if $H$ is a twisted Calabi-Yau (CY) Hopf algebra, then $L$ is a twisted CY algebra when it is homologically smooth. Especially, if $H$ is a Noetherian twisted CY Hopf algebra and $L$ has finite global dimension, then $L$ is a twisted CY algebra. 
Xingting Wang, Xiaolan Yu and Yinhuo Zhang
math.RA