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

Linocuts by Henk van der Vorst.... 続きを読む >>

I was amazed by two recent YouTube videos about the double pendulum.... 続きを読む >>

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

I admire the color scheme in the New York Times Games section and occasionally make it my colororder.... 続きを読む >>

Rob Schrieber is one of my very best friends.... 続きを読む >>

Nick Trethen is a world famous computational scientist and my good friend.... 続きを読む >>

Jack Dongarra is my student, colleague and friend.... 続きを読む >>

Pete Stewart is one of my closest colleagues.... 続きを読む >>

The tangram is an ancient Chinese puzzle with seven pieces.... 続きを読む >>