10 lines
231 B
Text
10 lines
231 B
Text
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import data.empty .path
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open path
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inductive tdecidable [class] (A : Type) : Type :=
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inl : A → tdecidable A,
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inr : ~A → tdecidable A
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structure decidable_paths [class] (A : Type) :=
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(elim : ∀(x y : A), tdecidable (x ≈ y))
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