Noun
multiset (plural multisets)
(set theory) A generalized type of set in which multiple occurrences of an element are permitted.
Synonyms: bag, mset
Two words are anagrams if they are made up of the same multiset of letters.
Another question is whether possible equality among entries in the given sequence is to be taken into account; if so, one should only generate distinct multiset permutations of the sequence. Source: Internet
In another generalized notion, E is a multiset of unordered pairs of (not necessarily distinct) vertices. Source: Internet
Generalization to negative integers For any n, : In particular, binomial coefficients evaluated at negative integers are given by signed multiset coefficients. Source: Internet
It can handle repeated values, for which case it generates the distinct multiset permutations each once. Source: Internet
The resulting numbers are called multiset coefficients ; citation. Source: Internet
Thus any groupoid is equivalent to a multiset of unrelated groups. Source: Internet