Seminar series
Date
Tue, 08 Oct 2019
14:30
14:30
Location
L2
Speaker
Florian Wechsung
Organisation
Oxford
We study nearly singular PDEs that arise in the solution of linear elasticity and incompressible flow. We will demonstrate, that due to the nearly singular nature, standard methods for the solution of the linear systems arising in a finite element discretisation for these problems fail. We motivate two key ingredients required for a robust multigrid scheme for these equations and construct robust relaxation and prolongation operators for a particular choice of discretisation.