Category Archives: mathematics

The short arm of coincidence

James Tanton tosses off number theory problems the way John D. Rockefeller handed out dimes. I wrote about one of Tanton’s problems back in January. Then a few weeks ago this tweet about factorials and squares snagged my attention, and … Continue reading

Posted in computing, featured, mathematics, problems and puzzles | 14 Comments

A Tantonalizing Problem

In times like these one craves distraction, or maybe anaesthesia. On the whole, mathematics is better for you than ethanol, and you can even do it while driving. So in spare moments I’ve been noodling away at the following problem, … Continue reading

Posted in mathematics, problems and puzzles | 7 Comments

Joint Mathematics Morsels

Atlanta. I’m at the Joint Mathematics Meetings, the annual smorgasbord where I never have time to fully digest my helping of algebraic geometry before I move on to a desert of cohomology. Here are a few easily swallowed morsels. Carey’s … Continue reading

Posted in mathematics | 1 Comment

Truth, Trump, and Trisectors

What is truth? said jesting Pilate, and did not stay for an answer. —Francis Bacon Lately there’s been a lot of news about fake news (some of it, for all I know, fake). Critics are urging Facebook, Google, and Twitter … Continue reading

Posted in mathematics, modern life, off-topic | 6 Comments


This weekend I’ll be attending a workshop at the University of Vermont, “Kummer Classes and Anabelian Geometry: An introduction to concepts involved in Mochizuki’s work on the ABC conjecture, intended for non-experts.” It was the last phrase in this title … Continue reading

Posted in mathematics | 5 Comments