Item 5 (004L) — 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`

Interaction With Unions III. We have equalities of sets
\begin{align*} U\setminus \webleft (V\cup W\webright ) & = \webleft (U\cup W\webright )\setminus \webleft (V\cup W\webright )\\ & = \webleft (U\setminus V\webright )\setminus W\\ & = \webleft (U\setminus W\webright )\setminus V \end{align*}

for each $U,V,W\in \mathcal{P}\webleft (X\webright )$.

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