Seminar series
Date
Thu, 22 Nov 2018
Time
14:00 -
15:00
Location
L4
Speaker
Prof Kent-Andre Mardal
Organisation
University of Oslo
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.