# Superset In mathematics, a [Set](Set%20Theory.md) $A$ is a [Subset](Subset.md) of a set $B$ if all elements of $A$ are also elements of $B$; $B$ is then a **superset** of $A$. It is possible for $A$ and $B$ to be equal; if they are unequal, then $A$ is a **proper subset** of $B$. --- Date: 20241210 Links to: Tags: References: * []()