M. Schweitzer

collaborators

2 papers

math.NA2026

Field-of-values analysis of augmented Krylov methods for matrix $φ$ -function actions

Xiaobo Liu, Marcel Schweitzer

We revisit established Krylov subspace methods for linear combinations of matrix $φ$ -function actions from the viewpoint of the block triangular formulation of Al-Mohy and Liu [SIA…

math.NA2024

Exploiting the the nonzero diagonal pattern in matrix function computations

Majed Hamadi, Nezam Mahdavi-Amiri, Marcel Schweitzer

We consider the task of approximating a matrix function $f (A)$ , where $A$ is a matrix in which only a relatively small number of (not necessarily consecutive) sub- and superdiagona…

Field-of-values analysis of augmented Krylov methods for matrix φ-function actions

Exploiting the the nonzero diagonal pattern in matrix function computations

Field-of-values analysis of augmented Krylov methods for matrix $φ$ -function actions