# Complement

Revision as of 01:45, 24 December 2018 by Tom (talk | contribs) (Created page with "Let $X$ be a set and let $Y \subset X$. The complement of $Y$ (in $X$), denoted $X \setminus Y$, is the set $\{z \in X \colon z \not\in Y\}$. Category:Definition")

Let $X$ be a set and let $Y \subset X$. The complement of $Y$ (in $X$), denoted $X \setminus Y$, is the set $\{z \in X \colon z \not\in Y\}$.