6 lines
185 B
Text
6 lines
185 B
Text
theorem ex6 (f : Nat → Nat) (x y z : Nat) (h : (x, z).1 = (fun x => x) y) : f x = f y := by
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simp (config := { beta := false }) at h
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traceState
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simp at h
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traceState
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simp [h]
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