$=$, $<$, and $\subseteq$

Example · High school

Terms

Term	This example	Why
relation	✓	$=$, $<$, and $\subseteq$ are relations because they make statements that are true or false: “$2 < 3$” is true and “$4 < 4$” is false.
binary operation	✗	$=$, $<$, and $\subseteq$ are not binary operations, because they do not produce a new number or set.

Distinctions using this example

• Operation vs. relation

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