关于奇异S—系与非奇异S—系

On Singular and Non-Singular S-systems

本文给出了奇异S—系与非奇异S—系的类的刻画。引进了闲子系的概念,并利用S—系的闭子系刻画S—系的奇异子系。

In this paper, we give some characteristics of singular and non-singular classes of S-systems. We introduc closed subsystems and show that, if S is nonsingular, the singular subsystem of a s-system M is just the intersection of ale closed subsystems of M.