The great mathematician Karl Freidrich Gauss is frequently quoted as saying “What we need are notions, not notations.” [In “About the proof...

Many math instructors use clickers in their larger lecture classes, and can cite numerous studies to show that they lead to more student at...

My May post is more than a little late. The initial delay was caused by a mountain of other deadlines. When I did finally start to come up ...

The first reviews of my new book Finding Fibonacci have just come out, and I have started doing promotional activities to try to raise awa...

Devlin makes a pilgrimage to Pisa to see the statue of Leonardo Fibonacci in 2002. In 1983, I did something that would turn out to ha...

The power of numbers to help us understand our world.

Two years ago, there was a sudden, viral spike in online discussion of the Ramanujan identity 1 + 2 + 3 + 4 + 5 + . . . = –1/12 This id...