fact: Definition cone_postcompose_precompose {D1 D2 : Diagram G} (m : DiagramMap D1 D2) `(f : Y -> X) (C : Cone X D1) : cone_precompose (cone_postcompose m C) f = cone_postcompose m (cone_precompose C f).
imports: Basics Types Diagrams.Graph Diagrams.Diagram