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Some change of ring theorems for matlis reflexive modules

 

作者: Richard Belshoff,  

 

期刊: Communications in Algebra  (Taylor Available online 1994)
卷期: Volume 22, issue 9  

页码: 3545-3552

 

ISSN:0092-7872

 

年代: 1994

 

DOI:10.1080/00927879408825040

 

出版商: Gordon and Breach Science Publishers Ltd.

 

数据来源: Taylor

 

摘要:

Suppose (R,m) →(S,n) is a local homomorphism of lo­cal rings. We show that if M is a Matlis reflexive R-module, thenR(S,M) and TorR(S,M) are Matlis reflexive S-modules if S is module-finite over the image of R. In case S = [Rcirc], the m-adic comple­tion of A, we show that ifMis a reflexive R-module, then [Rcirc] ⊗RMis a reflexive [Rcirc]-module and in factWe also show that if R is any local ring andMandNare two reflexive Ä-modules, then ExtR(M,N) and TorR(M,N) are reflexiveR-modules for all i.

 

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