bn:01150773n
Noun Concept
Categories: Operations on sets, Basic concepts in set theory
EN
disjoint union  direct sum  discriminated union  Disjoint unions  
EN
In mathematics, a disjoint union of a family of sets {\displaystyle } is a set A, {\displaystyle A,} often denoted by ⨆ i ∈ I A i, {\textstyle \bigsqcup _{i\in I}A_{i},} with an injection of each A i {\displaystyle A_{i}} into A, {\displaystyle A,} such that the images of these injections form a partition of A {\displaystyle A}. Wikipedia
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EN
In mathematics, a disjoint union of a family of sets {\displaystyle } is a set A, {\displaystyle A,} often denoted by ⨆ i ∈ I A i, {\textstyle \bigsqcup _{i\in I}A_{i},} with an injection of each A i {\displaystyle A_{i}} into A, {\displaystyle A,} such that the images of these injections form a partition of A {\displaystyle A}. Wikipedia
Modified union operation that indexes the elements according to which set they originated in Wikidata
A union of sets which are already pairwise disjoint. Wiktionary
Union of already disjoint sets. Wiktionary (translation)
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