摘要
本文定义更具一般性的模(未必是有限生成投射模)的常秩的概念,并证明了如果M有常秩n,∧^n M是有限生成的,则M是有限生成的,还证明了若M是有常秩n的投射模,则M一定是有限生成的。
In this note we define the notion of the constant rank of modules (not necessarily finitely generated projective modules) and prove that if M is of constant rank n and ∧^n M is finitely generated, then M is finitely generated, and that if M is a projective module of constant rank n, then M is finitely generated.
基金
国家自然科学基金(10671137)
教育部博士点专项科研基金(20060636001).
关键词
常秩
投射模
有限生成
constant rank
projective module
finitely generated