• On two combinatorial optimisation problems involving lotteries 

      Du Plessis, Andre (Stellenbosch : University of Stellenbosch, 2010-03)
      ENGLISH ABSTRACT: Suppose a lottery draw consists of forming a winning ticket by randomly choosing t m distinct numbers from a universal set Um = f1; : : : ;mg. Each lottery participant forms a set of tickets prior to ...
    • Metaheuristics for petrochemical blending problems 

      Venter, Lieschen (Stellenbosch : University of Stellenbosch, 2010-03)
      ENGLISH ABSTRACT: The main aim in blending problems is to determine the best blend of available ingredients to form a certain quantity of product(s). This product should adhere to strict speci cations. In this study ...