Titlebook: Abelian Groups and Modules; Proceedings of the P Alberto Facchini,Claudia Menini Conference proceedings 1995 Springer Science+Business Medi

他去就结束

Adj异类的

,7. Kapitel Völkerschlachtdenkmal,an a collection of pure subgroups .. indexed by an initial segment of ordinals with the property that .. ≤ .. when . < α and α whenever a is a limit ordinal. Especially, by a . it is meant any union .=U... of pure subgroups, where .. ≤ G . for each n <ω.