{G : Graph} {D : Diagram G} (i j : G) (f : G i j) (x : D i) : colim j (D _f f x) = colim i x := (cglue ((i; x); j; f))^.
Require Import Basics Types. Require Import Diagrams.Diagram. Require Import Diagrams.Graph. Require Import Diagrams.Cocone. Require Import Diagrams.ConstantDiagram. Require Import Colimits.Coeq.