Symbols:Set Theory/Set Union

Set Union

 * $\cup$

$S \cup T$ denotes the union of $S$ and $T$.

That is, $S \cup T$ is defined to be the set containing all the elements that are in either or both of the sets $S$ and $T$:


 * $S \cup T := \set {x: x \in S \lor x \in T}$