编辑本段理想(Order-ideal) 数学概念一个特定偏序集合(,≤)的非空子集 I 是一个理想,如果下列条件成立:对于所有 I 中的 x,y ≤ x 蕴涵 y 在 I 中。
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In the third part,we describe the order ideal of(p,q) type Lorentz Lie algebra and have three lemmas. Thus,we prove that all the ideals of(p,q) type Lorentz Lie algebra are standard if 2 is an unit of the ring.
文章的第三部分刻画了阶理想,层层递进地给出了三个引理,由此引出:在2∈R~*的情况下,(p,q)型Lorentz李代数的所有理想都是标准的。
参考来源 - 环上（pMoreover the relationship between order ideal and algebra ideal in complex f -algebra are discussed in great details.
并详细论证了复f-代数中序理想与代数理想的关系。
参考来源 - 复f—代数及正交射的性质研究·2,447,543篇论文数据，部分数据来源于NoteExpress
For a vacation outside of Canada and the United States, electrical adapters are ideal in order to use your hairdryer or your cell phone charger.
对于在美国和加拿大之外的假期，当你使用你的吹风机或是为手机充电时，电插头是理想之物。
Divide the figure you have calculated in step four by two (or similar conversion factor) in order to convert from ideal time to elapsed time.
用第四步中计算出的数字除以2(或是类似的转换因子)，由此把理想时间转换为持续时间。
And, it is doubly useful to compare these views and assessments against some standard or baseline, in order to understand the degree of variance from an ideal.
为了了解与理想情况的差异程度，将这些观察和评估与一些标准或基线比较是非常有用的。
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