1 of N

This was the second of Eugene Sargent‘s and my collaboration creating participation math art sculptures for the Gathering for Gardner. Here are notes. The fundamental question is, what is N? How many paths were available

Some polyhedra to print out and make

These are designed to be printed out or photocopied onto cardstock, cheaply and easily for a classroom activity or multipart curriculum. I’ve put my full polyhedron archive on Dropbox. Here are a few samples of

Some mathfun

Ptolemy Mathcards, among the finest of the world’s largest fictional mathematical trading card companies: The Math Factor CD. Check out the Mathfactor website! Infinity Number One, complete with stickers to stick and polyhedra to make!

5444

Welcome to hyperbolic geometry, with this beautiful steel rendition of the 5444 tiling: at each corner three squares and one pentagon meet, forcing the surface to bend and coil up with negative curvature. The straight

W.I.U.T.H.E.T.?

Foam fragments of the hyperbolic plane, formed from straight flat strips of foam. Differently spaced teeth on the sides of the strips force them to curve at a steady rate: any surface with equally spaced

Kaleidoscopes

Lots of great new symmetry stuff in the forthcoming Symmetries of Things: The Magic Theorem