R-module - R-module

Japanese: R 加群 - あーるかぐん
R-module - R-module

…When the multiplication of an element of R with an element of M is determined by multiplying an element of R from the right, an R- right module is defined by the same condition ( m , nM , r , sR ⇒( m + n ) r = mr + nr , m ( r + s ) = mr + ms , m ( rs ) = ( mr ) s , m ・1 = m ). If R is a commutative ring, we can define the multiplication from the right of an R -left module M as mr = rm to make it an R- right module, so there is no need to distinguish between right and left, and it is simply called an R -module. [Masayoshi Nagata]. …

*Some of the terminology that mentions "R-module" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… Rの元とMの元との乗法が,Rの元を右からかける形できまっているとき,R右加群が同様の条件(m,nM,r,sR⇒(mn)rmrnr,m(rs)=mrms,m(rs)=(mr)s,m・1=m)によって定義される。 Rが可換環であれば,R左加群Mに対して右からの乗法をmrrmと定めてR右加群とすることができるので,右,左の区別は不要となり,単にR加群という。【永田 雅宜】。…

※「R 加群」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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