fact: Definition is_least_upper_bound_image {I} (f : I -> P) {x : P} : is_least_upper_bound f x <-> is_least_upper_bound (pr1carrier (image f)) x.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.Combinatorics.WellOrderedSets UniMath.OrderTheory.DCPOs.AlternativeDefinitions.Dcpo