3 papers
math.NA2025
Hierarchical matrix approximability of inverse of convection dominated finite element matrices
Arthur Saunier, Leo Agelas, Ani Anciaux Sedrakian +2
Several researchers have developed a rich toolbox of matrix compression techniques that exploit structure and redundancy in large matrices. Classical methods such as the block low-…
math.NA2024
Accelerating non-local exchange in generalized optimized Schwarz methods
Roxane Atchekzai, Xavier Claeys
The generalized optimised Schwarz method proposed in [Claeys & Parolin, 2022] is a variant of the Després algorithm for solving harmonic wave problems where transmission conditions…
math.NA2023
Substructuring the Hiptmair-Xu preconditioner for positive Maxwell problems
R. Delville-Atchekzai, X. Claeys, M. Lecouvez
Considering positive Maxwell problems, we propose a substructured version of the Hiptmair-Xu preconditioner based on a new formula that expresses the inverse of Schur systems in te…