一个偏序集称为良序集(well ordered set), 如果其每一个非空子集都有最小元. 注意, 良序集必是全序集.
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partly well ordered set 半良序集
inversely well ordered set 逆良序集
well-ordered set [数] 良序集
semi-well-ordered set 半整序集
semi well ordered set 半整序集
weakly well ordered set 弱整序集
weakly-well-ordered set 弱整序集
standard well ordered set 标准良序集
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Finally we prove that well-ordered set and real set both have ordered topological hereditary.
最后证明了良序集和实数集合具有序拓扑遗传性。
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He ordered a set of changes in counterterrorism procedures, including how the watch list system operates, as well as new efforts to develop more sophisticated explosives detection technology for airport screening checkpoints.
NPR: 'System Failure' In U.S. Screening For Terrorists
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