Happy tau day!

It is 6/28! Happy tau day—a day that is twice as fun a pi day! Let’s celebrate our new favorite mathematical constant:  Remember, as Bob Palais told us, is wrong! I’m a fan of tau.

12 scholarly hoaxes, randomly generated articles, and other tricky fun

Everyone loves lists. Just for fun, here’s a (very) loosely-organized list of scholarly hoaxes, randomly generated content, and other interesting tidbits. Some of these I learned about recently, some I’ve known about for a long time. Theorem of the day—This website creates randomly generated “theorems.” Rejecta Mathematica—This journal publishes only articles that have been rejected by peer-reviewed…

What’s in a name?

I had an interesting interaction on Twitter today. I’m doing some research with a student that involves a little graph theory. We needed some graph theory terminology that I was sure was well-known (but not known to us), so I turned to Twitter. Let be a vertex of directed graph. Define to be the set…

The earth is big

I just stumbled upon this neat infographic which shows relative heights of objects from the top of Mount Everest all the way down to the bottom of the Mariana Trench. The top of the graphic is at an elevation of 38,000 ft and the bottom is 38,000 ft below sea level. The infographic image is…