Computing finite presentations of Tor and Ext over skew PBW extensions and some applications

Oswaldo Lezama, Melisa Paiba

In this paper we compute the $Tor$ and $Ext$ modules over skew $PBW$ extensions. If $A$ is a bijective skew $PBW$ extension of a ring $R$, we give presentations of $To{r}_r^A(M,N)$…