Eligius M.T. Hendrix

On monotonicity and search traversal in copositivity detection algorithms

  • Leocadio G Casado
  • Eligius M.T. Hendrix
  • Boglárka Tóth
    • Categories (Mixed) Integer Nonlinear Programming, Global Optimization, Quadratic Programming Tags , , ,

    Matrix copositivity has an important theoretical background. Over the last decades, the use of algorithms to check copositivity has made a big progress. Methods are based on spatial branch and bound, transformation to Mixed Integer Programming, implicit enumeration of KKT points or face-based search. Our research question focuses on exploiting the mathematical properties of the … Read more

    Inventory control for a perishable product with non-stationary demand and service level constraints

  • Rene Haijema
  • Eligius M.T. Hendrix
  • Karin G.J. Pauls-Worm
  • Jack G.A.J. van der Vorst
    • Categories Applications - OR and Management Sciences, Production and Logistics, Supply Chain Management Tags , ,

    We study the practical production planning problem of a food producer facing a non-stationary erratic demand for a perishable product with a fixed life time. In meeting the uncertain demand, the food producer uses a FIFO issuing policy. The food producer aims at meeting a certain service level at lowest cost. Every production run a … Read more

    Locating a competitive facility in the plane with a robustness criterion

  • Rafael Blanquero
  • Emilio Carrizosa
  • Eligius M.T. Hendrix
    • Categories Facility Planning and Design, Global Optimization Applications, Robust Optimization Tags , , , , , ,

    A new continuous location model is presented and embedded in the literature on robustness in facility location. The multimodality of the model is investigated, and a branch and bound method based on dc optimization is described. Numerical experience is reported, showing that the developed method allows one to solve in a few seconds problems with … Read more