# Product

Revision as of 02:40, 24 December 2018 by Tom (talk | contribs) (Created page with "Let $X$ and $Y$ be sets. We define the product of $X$ and $Y$ to be the set $X \times Y = \{(a,b) \colon a \in X, b \in Y\}$. Category:Definition")

Let $X$ and $Y$ be sets. We define the product of $X$ and $Y$ to be the set $X \times Y = \{(a,b) \colon a \in X, b \in Y\}$.