Example:Inequalities are relations

From CS2800 wiki

There are different ways to compare different kinds of objects; for example, there are the standard inequalities on numbers ([math]\gt, \lt, ≥, ≤, = [/math]), the set comparisons ([math]\href{/cs2800/wiki/index.php/Equality_(sets)}{=}, \href{/cs2800/wiki/index.php/%E2%8A%86}{⊆}, \href{/cs2800/wiki/index.php/%E2%8A%87}{⊇} [/math]), function equality, and so on.

All of these can be thought of as relations. For example, we might think of as a relation; [math](X,Y) \href{/cs2800/wiki/index.php/%E2%88%88}{∈} "\href{/cs2800/wiki/index.php/%E2%8A%86}{⊆}" [/math] if and only if [math]X \href{/cs2800/wiki/index.php/%E2%8A%86}{⊆} Y [/math].

As you can see, writing out relations this way can be confusing, but it is good to know that these operations are examples of relations.