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1)  σ additive
σ可加
1.
In this paper, after a sound analysis and discussion of the difference and relation between finitely additive and σ additive, the authors reach the conclusion that finitely additive can be deduced from σ additive, but σ additive cannot be deduced from finitely additive.
对概率论中的有限可加与σ可加的区别与联系进行比较分析 ,得出如下结果 :(1 )σ可加可以推出有限可加 ;(2 )有限可加推不出σ可
2)  σ-additive
σ可加性
1.
It is proved that μ is σ-additive if for each A∈ ,μA=V {μB;B∈ .
给出一种判别法,判定一个有限非负可加集函数是否有σ可加性,用二个例子说明这种判别法的优点。
3)  uniform σ-additivity
一致σ-可加性
4)  smallest sigma-additive family
最小σ可加族
5)  extension σfield
可拓σ-域
6)  σ-expandability
σ-可膨胀
1.
Three theorems concerning the σ-collectionwise normal,σ-expandability, and σ-metaexpandability of σ-products are proved.
证明了三个关于σ-集体正规、σ-可膨胀和σ-亚可膨胀的σ-积定理。
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