proposition: Theorem isomorphic_first_isomorphism_surjection : A / cong_ker f ≅ B.
proof: Proof. exact (BuildIsomorphic hom_first_isomorphism_surjection). Defined.
imports: HSet Colimits.Quotient Modalities.ReflectiveSubuniverse Classes.interfaces.canonical_names Classes.theory.ua_isomorphic Classes.theory.ua_subalgebra Classes.theory.ua_quotient_algebra