Kuramoto Oscillators I have blogged before about the work Indika Rajapakse, Steve Smale and I are doing to investigate the stability of Kuramoto... read more >>

The QR decomposition provides an estimate of the matrix condition number.... read more >>

I was amazed by two recent YouTube videos about the double pendulum.... read more >>

I admire the color scheme in the New York Times Games section and occasionally make it my colororder.... read more >>

The tangram is an ancient Chinese puzzle with seven pieces.... read more >>

In 1988, while I was with Ardent Computer in Silicon Valley, I gave a talk that previewed MATLAB graphics. The title was "Pictures of Matrices". At the time, a mathematician friend of mine asked.... read more >>

The Revolving Century puzzle is a beautifully made wooden puzzle from Creative Crafthouse in Hudson, Florida.... read more >>

No, this is not the script for an episode of "Game of Thrones". It is a blog post about Lindenmayer grammars, growing plants, space-filling fractals, turtle graphics and dragon curves.... read more >>

Two years ago, in March of 2023, an unlikely team of mathematical hobbyists announced the discovery of a remarkable 13-sided polygon that they nick-named the "Hat". Today, a Google search for the Hat's more formal name, "Aperiodic Monotile", yields dozens of links.... read more >>

A look at the structure, and the eigenvalues and singular values of interesting test matrices.... read more >>