Regular readers of this blog are probably well-acquainted with Euler’s beautiful polyhedron formula. Because I have written a few things about Euler’s formula, I get email about it from time-to-time. Most of the messages are very interesting and thought-provoking. The other day I received an email that asked: …Is the Gibbs phase rule for Variables, Phases, and Components the same thing as the Euler…

# Day: February 2, 2009

## 100th post

In honor of my 100th post I would like to share a quote from Freeman Dyson which appears in this month’s Notices of the American Mathematical Society. Some mathematicians are birds, others are frogs. Birds fly high in the air and survey broad vistas of mathematics out to the far horizon. They delight in concepts that unify our thinking…

## Clearance price fail

Happy Monday! Here’s a funny math-related photo from yesterday’s Failblog. Where to begin with this one? There’s so much wrong with it (what’s a Sentai Fortrs?). But despite all of its problems, at least they put a negative sign next to the sale price to match the direction of the price difference! [failblog.org]