Subset
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In mathematics, especially in set theory, a set A is a subset of a set B, or equivalently B is a superset of A, if A is "contained" inside B, that is, all elements of A are also elements of B.
A and B may coincide.
The relationship of one set being a subset of another is called inclusion or sometimes containment.
The subset relation defines a partial ordered set.
The algebra structure of subsets forms a Boolean algebra in which the subset relation is called inclusion.
See also
External links
- Subset @ Wikipedia.org
