11 lines
337 B
Text
11 lines
337 B
Text
prelude definition Prop : Type := Sort 0
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section
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variable {A : Type*} -- Mark A as implicit parameter
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variable R : A → A → Prop
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definition id (a : A) : A := a
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definition refl : Prop := forall (a : A), R a a
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definition symm : Prop := forall (a b : A), R a b -> R b a
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end
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check id.{2}
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check refl.{1}
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check symm.{1}
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