Some new finding for preconditioning of elliptic problems

22 November 2018
14:00
Prof Kent-Andre Mardal
Abstract


In this talk I will present two recent findings concerning the preconditioning of elliptic problems. The first result concerns preconditioning of elliptic problems with variable coefficient K by an inverse Laplacian. Here we show that there is a close relationship between the eigenvalues of the preconditioned system and K. 
The second results concern the problem on mixed form where K approaches zero. Here, we show a uniform inf-sup condition and corresponding robust preconditioning. 

  • Computational Mathematics and Applications Seminar