fact: Definition colimp {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))^.
imports: Basics Types Diagrams.Diagram Diagrams.Graph Diagrams.Cocone Diagrams.ConstantDiagram Colimits.Coeq