Laurent coefficients and Ext of finite graded modules

Luchezar L. Avramov, Ragnar-Olaf Buchweitz, Judith D. Sally

Let $R=\bigoplus_{n\ges0}R_n$ be a graded commutative ring generated over a field $K=R_0$ by homogeneous elements $x_1,\dots ,x_e$ of positive degrees $d_1,\dots ,d_e$. The Hilbert-S…