1 Matching Annotations
- Feb 2023
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math.libretexts.org math.libretexts.org
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⋂X∈CX={x∈U | x∈X for some X∈C}
Since the intersection must include only elements that appear in all sets, then it should read $$ x \in U | x \in X \forall X \in C $$, whereas the set builder notation here is the same as for the union.
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