Item 3 (00AD) — The Clowder Project

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`

Associativity. We have an isomorphism of pointed sets
\[ \webleft (\webleft (X\times Y\webright )\times Z,\webleft (\webleft (x_{0},y_{0}\webright ),z_{0}\webright )\webright ) \cong \webleft (X\times \webleft (Y\times Z\webright ),\webleft (x_{0},\webleft (y_{0},z_{0}\webright )\webright )\webright ) \]

natural in $\webleft (X,x_{0}\webright ),\webleft (Y,y_{0}\webright ),\webleft (Z,z_{0}\webright )\in \text{Obj}\webleft (\mathsf{Sets}_{*}\webright )$.

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