Example image of eyePlorer eyePlorer map for 'Preadditive category': Abelian group Category (mathematics) Category theory Enriched category Mathematics Monoidal category Bilinear map Integer Morphism Category of abelian groups Closed monoidal category Commutativity Group homomorphism Category of medial magmas Group (mathematics) Additive category Category of vector spaces Matrix (mathematics) Module (mathematics) Ring (mathematics) 0 (number) Zero morphism Distributivity Endomorphism Identity element 1 (number) Abstract nonsense Ideal (ring theory) Jacobson radical Quotient ring Functor Function (mathematics) If and only if Ring homomorphism Functor category Natural transformation Coproduct Finite set Product (category theory) Distinct Direct sum of modules Infinity Trivial ring Initial and terminal objects Trivial group Cokernel Kernel (category theory) Coequalizer Equalizer Kernel (algebra)