11 lines
268 B
Text
11 lines
268 B
Text
constant f : Nat → Nat
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constant q : Nat → (Nat → Prop) → Nat
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@[simp]
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theorem ex {x : Nat} {p : Nat → Prop} (h₁ : p x) (h₂ : q x p = x) : f x = x :=
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sorry
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set_option trace.Meta.Tactic.simp.discharge true
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theorem foo : f (f x) = x := by
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simp
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sorry
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