Definition is_ver_cylinder {B : ver_bicat_sq_id_comp_whisker} {w x y z : B} {v₁ v₁' : w -|-> y} {v₂ v₂' : x -|-> z} {h₁ : w --> x} {h₂ : y --> z} (s : square_double_bicat h₁ h₂ v₁ v₂) (s' : square_double_bicat h₁ h₂ v₁' v₂') (τ₁ : v₁ =|=> v₁') (τ₂ : v₂ =|=> v₂') : UU := τ₁ ◃s s' = τ₂ ▹s s.
Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Prelude. Require Import UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat. Require Import UniMath.Bicategories.Core.Bicat. Import Bicat.Notations.