fact: Definition issurjinj_transf {A B : Type} {F : A -> B} {G : A -> B} `{IsSurjInj A B F} `{!Is0Functor G} (alpha : G $=> F) : IsSurjInj G.
imports: Basics.Overture Basics.Tactics WildCat.Core WildCat.NatTrans WildCat.Sigma