当(G,G_+)是一个序群时,文章得到结论:Ω存在最大θ-不变闭的真子集当且仅当存在一个严格包含G_+的G的最小半群。
参考来源 - Last but not least, while (G,G_+) happens to be an ordered group, the paper gets the conclu-sion that Ωexists a largest closed θ-invariant proper subset if and only if there exists a smallestsemigroup of G strictly containing G_+.·2,447,543篇论文数据，部分数据来源于NoteExpress
流劈理的成因机制是讨论辽河群层序有序性的核心问题。
The origin of flow cleavage is the core to discuss the ordered Liaohe Group sequences.
讨论了含最大元的偏序半群的若干性质，给出了含最大元的偏序半群中某些子集构成理想的充要条件。
Some properties of partially ordered semigroup containing the greatest element are discussed, the sufficient and necessary conditions that some subsets of it make up an ideal are given.
对基于方案优先序的多目标群决策问题给出了若干求解群排序的方法。
Several models are presented to MOGD based on the single decision-maker′s priority-ranking of alternatives.
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