Showing math.NAShow all
2 papers · 1 filter
math.NA2025
Determinant-Based Error Bounds for CUR Matrix Approximation: Oversampling and Volume Sampling
Frank de Hoog, Markus Hegland
We derive error bounds for CUR matrix approximation using determinant-based methods that relate local projection errors to global approximation quality. For general matrices, we es…
math.NA2023
Generalized Gearhart-Koshy acceleration is a Krylov subspace method
Markus Hegland, Janosch Rieger
The Kaczmarz method is a row-action method for solving consistent non-square linear systems, and Gearhart-Koshy acceleration is a line-search that minimizes the Euclidean norm of t…