20 lines
621 B
Text
20 lines
621 B
Text
definition Prop : Type.{1} := Type.{0}
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constant and : Prop → Prop → Prop
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section
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parameter {A : Type} -- Mark A as implicit parameter
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parameter R : A → A → Prop
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parameter B : Type
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definition id (a : A) : A := a
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private definition refl : Prop := ∀ (a : A), R a a
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definition symm : Prop := ∀ (a b : A), R a b → R b a
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definition trans : Prop := ∀ (a b c : A), R a b → R b c → R a c
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definition equivalence : Prop := and (and refl symm) trans
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end
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check id.{2}
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check trans.{1}
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check symm.{1}
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check equivalence.{1}
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(*
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local env = get_env()
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print(env:find("equivalence"):value())
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*)
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