Item 1 (002R) — The Clowder Project

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Style	Class	Font	Theorem Environments
Style 1	`book`	Alegreya Sans	`tcbthm`
Style 2	`book`	Alegreya Sans	`amsthm`
Style 3	`book`	Arno*	`amsthm`
Style 4	`book`	Computer Modern	`amsthm`

*To be replaced with Linus Romer's Elemaints when it is released.

Quotients by Equivalence Relations. Let $R$ be an equivalence relation on a set $X$. We have a bijection of sets
\[ X/\mathord {\sim }_{R}\cong \text{CoEq}\webleft (R\hookrightarrow X\times X\underset {\text{pr}_{2}}{\overset {\text{pr}_{1}}{\rightrightarrows }}X\webright ). \]

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