Intervenant: Achraf Badahmane (LMPA Joseph Liouville) Date et lieu: vendredi 16 juin à 14h30 en salle B014. Titre : Saddle point problems Résumé: Abstract: In some applications, we have to solve large linear saddle point problems with multiple right-hand sides. Instead of applying a standard iterative process to the solution of each saddle point problem indepentely, it’s more efficient to apply a global process. We use different techniques of preconditioning ( Diagonal preconditioner, Triangular preconditioner, P0 preconditioner ,.. ) to improve spectral proprieties of the saddle point matrix and to accelerate the convergence .