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单词 Index set
释义

Index set

中文百科

指标集

在数学中,集合 A 的元素有时可以凭借某个集合 J索引(index)或标定(label),这时便称集合 J 为索引集。索引由从 JA 的一个满射函数构成,而被索引的搜集称为索引族标记族加标族,通常写为(Aj)jJ

英语百科

Index set 指标集

In mathematics, an index set is a set whose members label (or index) members of another set. For instance, if the elements of a set A may be indexed or labeled by means of a set J, then J is an index set. The indexing consists of a surjective function from J onto A and the indexed collection is typically called an (indexed) family, often written as (Aj)jJ.

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更新时间:2025/6/17 2:07:33