σ-function,sigma-function
基本释义:
σ函数
网络释义
1)σ-function,sigma-function,σ函数
2)function σ(a),σ(a)函数
3)Ωα(β,σ) function,Ωα(β,σ)函数
4)σ index,σ指数
5)Hammett constant(σ),Hammett常数(σ)
6)sigma-algebra,σ-代数
用法和例句
A new method of water quality assessment σ index was given in the present paper.
给出水质评价中的一种新方法σ指数
It is well known that f(F) forms a sigma-algebra over S if f satisfies the bijective condition.
周知,若f满足双射条件,则f(F)构成S上的一个σ-代数。
It is shown that the ideal-mappings are more general than the bijective mappings,and moreover their actions on a set class and the operations of generating a sigma-algebra,a monotone class and a λ-class are commutative.
在可测空间上引进了理想映射的概念,证明了理想映射是比双射更一般的一类映射,同时理想映射在一个集类上的作用与相应的生成σ-代数、生成单调类及生成λ-类运算均可交换次序。
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