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

Linocuts by Henk van der Vorst.... 更多内容 >>

I was amazed by two recent YouTube videos about the double pendulum.... 更多内容 >>

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