6 lines
212 B
Text
6 lines
212 B
Text
id : ?A → ?A
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trans : (?A → ?A → Prop) → Prop
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symm : (?A → ?A → Prop) → Prop
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equivalence : (?A → ?A → Prop) → Prop
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λ (A : Type) (R : A → A → Prop),
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and (and (refl R) (symm R)) (trans R)
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