2015-02-26 00:20:44 +00:00
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definition symm {A : Type} : Π {a b : A}, a = b → b = a
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2016-07-09 17:29:34 +00:00
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| a a (eq.refl a) := rfl
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2015-01-03 06:22:20 +00:00
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2015-02-26 00:20:44 +00:00
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definition trans {A : Type} : Π {a b c : A}, a = b → b = c → a = c
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2016-07-09 17:29:34 +00:00
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| a a a (eq.refl a) (eq.refl a) := rfl
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