Subset

A set whose elements are all contained entirely within another set. If every element of set $A$ is also an element of set $B$, then $A$ is considered a subset of $B$.

Example

If $B = \{1, 2, 3, 4, 5\}$ and $A = \{2, 4\}$, then $A$ is a subset of $B$, mathematically denoted as $A \subseteq B$.

See Also

• Set
• Proper Subset