theorem
proved
term proof
trans
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formal statement (Lean)
65theorem trans {C₁ : DisplayChannel State Obs₁}
66 {C₂ : DisplayChannel State Obs₂}
67 {C₃ : DisplayChannel State Obs₃}
68 (h₁₂ : QualityEquiv C₁ C₂) (h₂₃ : QualityEquiv C₂ C₃) : QualityEquiv C₁ C₃ :=
proof body
Term-mode proof.
69 fun x y => (h₁₂ x y).trans (h₂₃ x y)
70
71/-- Quality-equivalent channels have the same optimal states. -/