fact: Definition PO_ind_obj (P : PO f g -> Type) (l' : forall b, P (pol b)) (r' : forall c, P (por c)) : forall (i : span_graph) (x : obj (span f g) i), P (colim i x).
imports: Basics Types Diagrams.Graph Diagrams.Diagram Diagrams.Span Diagrams.Cocone Colimits.Colimit