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def definition def or abbrev

quotientMapRight

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formal statement (Lean)

 120def quotientMapRight (r₁ : Recognizer C E₁) (r₂ : Recognizer C E₂) :
 121    RecognitionQuotient (r₁ ⊗ r₂) → RecognitionQuotient r₂ :=

proof body

Definition body.

 122  Quotient.lift (recognitionQuotientMk r₂) (fun c₁ c₂ h =>
 123    (quotientMk_eq_iff r₂).mpr (composite_refines_right r₁ r₂ h))
 124
 125/-- The quotient maps are surjective -/

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