fact: Definition Iso_same_cst `{OA : @ON A ltA compareA} `{OB : @ON B ltB compareB} {f : A -> B} {g : B -> A} {_ : ON_Iso OA OB f g} (a : A) (b : B) := f a = b.
imports: Coq(RelationClasses Relation_Operators Ensembles) hydras(OrdNotations Schutte_basics)