## SUBSET

### Subset

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**.

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### subset

#### Noun

- With respect to another set, a set such that each of its elements is also an element of the other set.
*The set of integers is a subset of the set of reals.*- The set {a, b} is a both a subset and a proper subset of {a, b, c} while the set {a, b, c} is a subset of {a, b, c} but not a proper subset of {a, b, c}.

- A group of things or people, all of which are in a specified larger group.
*We asked a subset of the population of the town for their opinion.*

*The above text is a snippet from Wiktionary: subset*

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