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单词 CountingMeasure
释义

counting measure


Let (X,𝔅) be a measurable spaceMathworldPlanetmathPlanetmath. The measureMathworldPlanetmath μ on X defined by

μ(A)={nifA has exactly n elementsotherwise.

for all A𝔅 is called the counting measure on X.Usually this is applied when X is countable, e.g. or .

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更新时间:2025/5/4 12:15:18