The Artinian property of certain graded generalized local chohomology modules

Document Type : Research Paper


Department of Mathematics, Soochow University


 Let $R=\oplus_{n\in \Bbb N_0}R_n$ be a
Noetherian homogeneous ring with local base ring
$(R_0,\frak{m}_0)$, $M$ and $N$ two finitely generated graded
$R$-modules. Let $t$ be the least integer such that
$H^t_{R_+}(M,N)$ is not minimax. We prove that
$H^j_{\frak{m}_0R}(H^t_{R_+}(M,N))$ is Artinian for $j=0,1$. Also,
we show that if ${\rm cd}(R_{+},M,N)=2$ and $t\in \Bbb N_0$, then
$H^t_{\frak{m}_0R}(H^2_{R_+}(M,N))$ is Artinian if and only if
$H^{t+2}_{\frak{m}_0R}(H^1_{R_+}(M,N))$ is Artinian.


Main Subjects