There is a bit difficult in judging covering assembly in partially ordered relation on a basis of its definition in discrete mathematic.
直接根据现有离散数学教材中偏序关系中“盖住”的定义，来判定偏序关系中的盖住集，有时比较困难。
Through the discussion of role partial ordered relation and administer field the usability and security of this design scheme are proved.
通过对角色偏序关系和角色管辖域的讨论，说明了该设计方案的可用性和安全性。
That can become decomposition partially ordered set into totally ordered subset by analyzing the characteristics of partially ordered relation construction on partially ordered set.
通过分析运用调机时区集合上的偏序结构特点，可以知道使用调机问题的实质是偏序集合的全序分解问题。
The money he'd been ordered to pay was minimal in relation to his salary.
他被要求支付的钱与他的薪水相比是少的。
Ordered element constituant , relation between combinational element and ordinal number and the calculating formula are expounded in this paper.
讨论有序元素的组合；组合元素和序数的关系以及计算公式。
Ideal and Greens relation theoretical characterizations of quasi intra regular ordered semigroups are given.
对拟内正则序半群给出了在理想和格林关系理论方面的若干刻划。
In the paper we introduce the concepts of L-trivial, nil ordered semigroups and give every ordered semigroup is L-trivial if and only if the left divisibility relation is an order.
特别地，我们还讨论了序零半群，给出了这类半群与偏序半群上的左整除关系链的关系。
In the paper we introduce the concepts of L-trivial, nil ordered semigroups and give every ordered semigroup is L-trivial if and only if the left divisibility relation is an order.
特别地，我们还讨论了序零半群，给出了这类半群与偏序半群上的左整除关系链的关系。
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