Velvel Kahan's informal name in Yiddish, װעלװעל, means "little wolf." If he needs a more formal name, Velvel uses William.... read more >>

My first blog about SVD and Partisanship in the U. S. Senate was five years ago. Today's post updates that to 2025.... read more >>

Nick Trethen is a world famous computational scientist and my good friend.... read more >>

Pete Stewart is one of my closest colleagues.... read more >>

The twenty-second Householder Symposium on Numerical Linear Algebra was held June 8 - June 13 at Cornell. The local organizers were Anil Damle, Alex Townsend and David Bindel. Anil served as host and cheerleader.... read more >>

A look at the structure, and the eigenvalues and singular values of interesting test matrices.... read more >>

MATLAB has two different ways to compute singular values. The easiest is to compute the singular values without the singular vectors. Use svd with one output argument, s1.... read more >>

LUTool provides an interactive animation of Gaussian elimination, the most important algorithm in technical computing.... read more >>

Recently, I have made a series of blog posts about Redheffer matrices and the Mertens conjecture. After each of the posts, readers and colleagues offered suggestions to speed up the calculations. Here is a summary of what I have learned.... read more >>

The NA-Digest is an electronic newsletter for the numerical analysis and scientific software community. The NA-Digest is one of world's first examples of social networking. The Digest is one of the forces that makes our community a living, viable community.... read more >>