Hochschild Cohomology of skew group rings and invariants

Eduardo do Nascimento Marcos, Roberto Martinez-Villa, Maria Izabel Ramalho Martins

Let $A$ be a $k$-algebra and $G$ be a group acting on $A$. We show that $G$ also acts on the Hochschild cohomology algebra $H{H}^{\bullet }(A)$ and that there is a monomorphism of rin…