multiset

英/ ˌmʌltɪˈset /

1
[计] 多重集
多重集 ( Multiset )：元素可以重复出现的集合。如：：元素可以重复出现的集合。
2
多重集合
...指向不同元素的指针组成的数组；集合（set）是由节点组成的，每个节点包含一个元素，节点间以某种谓词排序；多重集合（multiset）是允许存在两个次序相等的元素集合；映射（map）是由{键，值}对组成的集合，同样以某种谓词排序；多重映射（multimap）是允许键对...
3
多集合
集合中元素的数量称为基（cardinaliy），写作|S|。除了标准的集合符号，我们也使用多集合（multiset），其内部允许存在相同元素。多集合的基是其中元素的总数量，包括相同的元素。
4
多集
基于证书修改的数字权限动态描述 - 计算机应用研究 - 金月芽期刊网免费论文下载关键词:多集; 证书; 规则; 证书修改 [gap=681]Key words:multiset; license; rules; license rewriting

短语

1
If you are familiar with the mathematical idea of a multiset, a Counter is a natural way to represent a multiset.
如果你对数学上多重集的概念有所了解，就会知道计数器是一种对多重集的表示方式。

multi- +‎ set

FROM: wiktionary

Multiset
In mathematics, the notion of multiset (or bag) is a generalization of the notion of a set in which members are allowed to appear more than once. For example, there is a unique set {a, b} containing elements a and b and no others, but there are many multisets containing a and b (and no others) with various multiplicities. For instance, in the multiset {a, a, b}, a has multiplicity 2 and b has multiplicity 1; and in the multiset {a, a, a, b, b, b}, a and b each have multiplicity 3. The term "multiset" was coined by Nicolaas Govert de Bruijn in the 1970s. The use of multisets in mathematics and beyond predates the name "multiset" by many centuries: Knuth (1998) attributes the first study of multisets to the Indian mathematician Bhāskarāchārya (circa 1150), who described permutations of multisets.

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