Category:Definitions/Set Union

This category contains definitions related to Set Union.
Related results can be found in Category:Set Union.

Let $S$ and $T$ be sets.

The (set) union of $S$ and $T$ is the set $S \cup T$, which consists of all the elements which are contained in either (or both) of $S$ and $T$:

$x \in S \cup T \iff x \in S \lor x \in T$

Also see

Category:Definitions/Class Union