群环的几种同调维数

设R为有单位元的G为群，本文给出了群环RG的整体同调维数，弱维数及有限表示维数与R的相应维数之间的关系，由这些关系出发，本文还给出了RG的环结构与R的环结构及G的群结构之间的一些关系，过去有关的一些经典结果是本文结果的特例。

On a Result of Pointed Representations of finite Dimensional Simple Lie Algebras

There have been a great many of studies on the pointed representations of fi- nite-dimensional sanple Lie algebras.cf.[1][2]etc.In this paper we give a new proof of an impottant Lemma,and from this we derive our main result:Irreducible pointed modules of finite -dimesional simple Lie algebras are all Harish-Chandra modules.

On Left (N, U)-Coherent Dimensions of Rings

Let R, S be rings, U a flat right .R-rnodule and V a flat right S-module. We show in this paper that (N, (U, V))-lc.dim(R(?) S) = sup((N, U)-lc.dimR, (N, V)-lc.dimS).