Absorption Laws (Set Theory)/Intersection with Union/Proof 1
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Theorem
- $S \cap \paren {S \cup T} = S$
Proof
\(\ds \) | \(\) | \(\ds S \subseteq \paren {S \cup T}\) | Set is Subset of Union | |||||||||||
\(\ds \) | \(\leadsto\) | \(\ds S \cap \paren {S \cup T} = S\) | Intersection with Subset is Subset‎ |
$\blacksquare$