Nakayama automorphisms of graded Ore extensions of Koszul Artin-Schelter regular algebras

Y. Shen, Y. Guo

Let $A$ be a Koszul Artin-Schelter regular algebra, $\sigma$ a graded automorphism of $A$ and $\delta$ a degree-one $\sigma$-derivation of $A$. We introduce an invariant for $\delta$ called the $\sigma$-di…