internal_commutative_monoids,internal_commutative_monoids_label,parent,parent_label CMon,CMon,Set,Set NormRing,NormRing,NormGrp,NormGrp CommAlg(Ab),CommAlg(Ab),Mod(Ab),Mod(Ab) BanRing,BanRing,CompNormGrp,CompNormGrp DGCAlg,DGCAlg,Ch.(Vect_k),Ch.(Vect_k) CRing,CRing,Ab,Ab