4 citations · 5 across the 2 of their papers we have counts for
3 papers
math.NA2014★ 1 cited
kappa_SQ: A Matlab package for randomized sampling of matrices with orthonormal columns
Thomas Wentworth, Ilse Ipsen
The kappa_SQ software package is designed to assist researchers working on randomized row sampling. The package contains a collection of Matlab functions along with a GUI that ties…
math.NA2014
Conditioning of Leverage Scores and Computation by QR Decomposition
John T. Holodnak, Ilse C. F. Ipsen, Thomas A. Wentworth
The leverage scores of a full-column rank matrix A are the squared row norms of any orthonormal basis for range(A). We show that corresponding leverage scores of two matrices A and…
math.NA2012★ 4 cited
The Effect of Coherence on Sampling from Matrices with Orthonormal Columns, and Preconditioned Least Squares Problems
Ilse C. F. Ipsen, Thomas Wentworth
Motivated by the least squares solver Blendenpik, we investigate three strategies for uniform sampling of rows from m x n matrices Q with orthonormal columns. The goal is to determ…