• Weighted centrality, and a further approach to categorical commutativity 

      Shaumbwa, Vaino Tuhafeni (Stellenbosch : Stellenbosch University, 2019-12)
      ENGLISH ABSTRACT: We investigate weighted commutators, that is, weighted subobject commutator and weighted normal commutator, as well as commutators in the sense of Huq, Higgins, Ursini and Smith, which are all special ...
    • Contributions to the theory of Beidleman near-vector spaces 

      Djagba, Prudence (Stellenbosch : Stellenbosch University, 2019-12)
      ENGLISH SUMMARY: (Please refer to the abstract on the full text for symbols that did not translate well into this abstract). The study of nearfields was started in 1905 by L.E. Dickson. This thesis is a first step toward ...
    • Concrete foundations of the theory of Noetherian forms 

      Van Niekerk, Francois Koch (Stellenbosch : Stellenbosch University, 2019-12)
      ENGLISH ABSTRACT: This thesis concerns certain investigations in abstract algebra that bring together the ideas of the category of algebraic structures and the lattice of substructures. A central notion in such investigation ...