摘要
在Fuchs的名著“Partiallyorderedalgebraicsystem”中列出了 40个未解决的问题 .刘绍学在“关于有向群Fuchs问题的一点注记”一文中给出了其中第一、二个问题的一个解答 ,本文给出这一问题的另一个解答 ,并对DE-序群讨论类似的问题 .
Fuchs listed 40 unsolved questions in his famous “Partially ordered algebraic system”.Liu Shou xue solved the first and the second questions. Another answers to the two questions are given, and the similar problem of DE-order group is studied.
关键词
偏序
有向群
扩展
ED-序
partial order
direct ordered group
extension
DE-order
