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Weakened assumption of singleton_isIn_d

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Niels van der Weide committed 2017-09-21 14:24:27 +02:00
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FiniteSets/kuratowski/properties.v
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@@ -320,7 +320,7 @@ Section properties_membership_decidable.
apply comprehension_isIn_d.
Defined.
Lemma singleton_isIn_d `{DecidablePaths A} (a b : A) :
Lemma singleton_isIn_d `{IsHSet A} (a b : A) :
a ∈ {|b|} -> a = b.
Proof.
intros.