fact: Definition path_cocone {C1 C2 : Cocone D X} (path_legs : forall i, C1 i == C2 i) (path_legs_comm : forall i j g x, legs_comm C1 i j g x @ path_legs i x = path_legs j (D _f g x) @ legs_comm C2 i j g x) : C1 = C2.
imports: Basics Types Diagrams.Graph Diagrams.Diagram