A BFBt preconditioner for Double Saddle-Point Systems
Abstract
We consider block preconditioners for double saddle-point systems, and investigate the effect of approximating the nested Schur complement associated with the trailing diagonal block on the eigenvalue distribution of the preconditioned matrix. We develop a variant of Elman's BFBt method and adapt it to this family of linear systems. Our findings are illustrated on a Marker-and-Cell discretization of the Stokes-Darcy equations.
Fields of Study & Subjects
Matrix Theory and Algorithms
Advanced Numerical Methods in Computational Mathematics
Computational Fluid Dynamics and Aerodynamics
Publication details
- Journal / source
- arXiv (Cornell University)
- Publication date
- 26 January 2026
- Document type
- Preprint