Preconditioning and deflation techniques for interior point methods

Dr Rachael Tappenden
Abstract
The accurate and efficient solution of linear systems Ax = b is very important in many engineering and technological applications, and systems of this form also arise as subproblems within other algorithms. In particular, this is true for interior point methods (IPM), where the Newton system must be solved to find the search direction at each iteration. Solving this system is a computational bottleneck of an IPM, and in this talk I will explain how preconditioning and deflation techniques can be used, to lessen this computational burden. This is joint work with Jacek Gondzio.
  • Computational Mathematics and Applications Seminar