Symbols:Set Theory/Set Difference

Set Difference

 * $\setminus$

The difference between two sets $S$ and $T$ is denoted $S \setminus T$ and consists of all the elements of $S$ which are not elements of $T$.


 * $S \setminus T := \set {x \in S: x \notin T}$

Also see
See Number Theory: Divisor for an alternative use of this symbol.