fact: Definition two_disp_post_whisker_left {D : twosided_disp_cat} {x₁ x₂ x₃ : C₁} {y₁ y₂ y₃ : C₂} {xy₁ : D x₁ y₁} {xy₂ : D x₂ y₂} {xy₃ : D x₃ y₃} {f₁ : x₁ --> x₂} {f₂ f₂' : x₂ --> x₃} (p : f₂' = f₂) {g₁ : y₁ --> y₂} {g₂ : y₂ --> y₃} (fg₁ : xy₁ -->[ f₁ ][ g₁ ] xy₂) (fg₂ : xy₂ -->[ f₂' ][ g₂ ] xy₃) : fg₁ ;;2 transportf (λ z, _ -->[ z ][ _ ] _) p fg₂ = transportf (λ z, _ -->[ z ][ _ ] _) (maponpaths (λ z, _ · z) p) (fg₁ ;;2 fg₂).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.PrecategoryBinProduct