Arbeitsgebiete

Constructive complex variables

  • Best approximation by rational functions
  • Padé-type approximation
  • Numerical analytic continuation

Iterative solution of linear systems of algebraic equations

  • Krylov subspace methods
  • Preconditioning
  • Error estimates

Matrix functions

  • Restarted Krylov methods
  • Convergence analysis
  • Differentiation of matrix functions