A mod R

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Definition: A/R
If [math]R [/math] is an equivalence relation on a set [math]A [/math], then A mod R (written [math]\href{/cs2800/wiki/index.php/A/R}{A/R} [/math]) is the set of all equivalence classes of [math]A [/math] by [math]R [/math]. In other words, [math]\href{/cs2800/wiki/index.php/A/R}{A/R} := \{\href{/cs2800/wiki/index.php/%E2%9F%A6a%E2%9F%A7}{⟦a⟧} \href{/cs2800/wiki/index.php/%5Cmid}{\mid} a \href{/cs2800/wiki/index.php/%E2%88%88}{∈} A\} [/math].