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Elements of union

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Niels 2017-05-24 14:52:52 +02:00
parent 826b6ba233
commit 74cd449f7b
1 changed files with 6 additions and 0 deletions
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6
FiniteSets/properties.v
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@ -429,4 +429,10 @@ hrecursion X; try (intros ; apply set_path2).
rewrite <- Q. rewrite <- Q.
Admitted. Admitted.
Theorem union_isIn (X Y : FSet A) (a : A) : isIn a (U X Y) = orb (isIn a X) (isIn a Y).
Proof.
reflexivity.
Defined.
End properties. End properties.