9 lines
229 B
Text
9 lines
229 B
Text
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set_option pp.implicit true
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set_option pp.notation false
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definition symm : Π {A : Type} {a b : A}, a = b → b = a,
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symm rfl := rfl
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definition trans : Π {A : Type} {a b c : A}, a = b → b = c → a = c,
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trans rfl rfl := rfl
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