2 papers
math.NA2025
Triangular preconditioners for double saddle point linear systems arising in the mixed form of poroelasticity equations
Luca Bergamaschi, Massimiliano Ferronato, Angeles Martinez
In this paper, we study a class of inexact block triangular preconditioners for double saddle-point symmetric linear systems arising from the mixed finite element and mixed hybrid…
math.NA2022
Parallel Matrix-free polynomial preconditioners with application to flow simulations in discrete fracture networks
L. Bergamaschi, M. Ferronato, G. Isotton +2
We develop a robust matrix-free, communication avoiding parallel, high-degree polynomial preconditioner for the Conjugate Gradient method for large and sparse symmetric positive de…