On the global dimension of skew polynomial rings
On the global dimension of skew polynomial rings
复制标题
关于斜多项式环的全局维数
DOI:
10.1016/0021-8693(69)90002-7
复制
发表时间:
1969
影响因子:
0.9
通讯作者:
K. Fields
中科院分区:
文献类型:
--
作者:
K. Fields
In this note we attempt to compute the global dimension of a skew polynomial ring1 R [x; 01, where u is an injective endomorphism of R and YX L= XP VYE R. When o is the identity, the (generalized) Hilbert Syzygy Theorem states that lgld R [x; o]= lgld R+ 1 [4]. We extend this result to the case when o is any automorphism of R. We also consider skew power series rings and state some results when CJ is not an automorphism. Our general approach to the problem is due to Kaplansky.DEFINITION. Let R be a subring of S, I an ideal of R. Let1-l=(sESISICR and IsCR).