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**.

Read more about Subset: Definitions, The Symbols ⊂ and ⊃, Examples, Other Properties of Inclusion

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