11 lines
316 B
Text
11 lines
316 B
Text
theorem Sum.inl_ne_inr' : inl a ≠ inr b := nofun
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theorem Sum.inr_ne_inl' : inr b ≠ inl a := nofun
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theorem Sum.inl_ne_inr'' : inl a ≠ inr b := by nofun
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theorem Sum.inr_ne_inl'' : inr b ≠ inl a := by nofun
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def f (a b : Bool) (_ : Sum.inr b ≠ Sum.inl a) : Nat := 0
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example : f true true nofun = 0 := rfl
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