XRy
From CS2800 wiki
Notation: If is a binary relation on a set , and if and are elements of , then is shorthand for .
For example, we usually write instead of .
Notation: If [math]R
[/math] is a binary relation on a set [math]A
[/math], and if [math]x
[/math] and [math]y
[/math] are elements of [math]A
[/math], then [math]xRy
[/math] is shorthand for [math](x,y) \href{/cs2800/wiki/index.php/%E2%88%88}{∈} R
[/math].
For example, we usually write [math]x ≤ y [/math] instead of [math](x,y) \href{/cs2800/wiki/index.php/%E2%88%88}{∈} ≤ [/math].
