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Weakened assumption of singleton_isIn_d
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@@ -320,7 +320,7 @@ Section properties_membership_decidable.
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apply comprehension_isIn_d.
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Defined.
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Lemma singleton_isIn_d `{DecidablePaths A} (a b : A) :
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Lemma singleton_isIn_d `{IsHSet A} (a b : A) :
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a ∈ {|b|} -> a = b.
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Proof.
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intros.
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