If
[math]A
[/math] and
[math]B
[/math] are
sets, then the
set difference [math]A
[/math] minus
[math]B
[/math] (written
[math]A \href{/cs2800/wiki/index.php/%5Csetminus}{\setminus} B
[/math]) is given by
[math]A \href{/cs2800/wiki/index.php/%5Csetminus}{\setminus} B \href{/cs2800/wiki/index.php/Definition}{:=} \{x \href{/cs2800/wiki/index.php/%5Cmid}{\mid} x \href{/cs2800/wiki/index.php/%5Cin}{\in} A \href{/cs2800/wiki/index.php/And}{\text{ and }} x \href{/cs2800/wiki/index.php/%5Cnotin}{\notin} B\}
[/math].
