# Union/Related Articles

< Union

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*See also changes related to Union, or pages that link to Union or to this page or whose text contains "Union".*

## Parent topics

- Set (mathematics) [r]: Informally, any collection of distinct elements.
^{[e]} - Set theory [r]: Mathematical theory that models collections of (mathematical) objects and studies their properties.
^{[e]}

## Subtopics

- Disjoint union [r]: A set containing a copy of each of a family of two or more sets, so that the copies do not overlap.
^{[e]} - Intersection [r]: The set of elements that are contained in all of a given family of two or more sets.
^{[e]}