*This gallery contains 17 photos.*

A varied assortment of Sonobe creations.

There was a nice little piece in the Times reviewing an exhibition on origami and fractals in LA — if I were a West Coaster, I’d definitely drop by. As is, just posting to correct the recent deficit of origami-related material … Continue reading

This post lists everything I’ve written about the mathematics of origami. Origami and math Sonobe and “underlying geometry” Update on breaking the underlying geometry Sonobe puzzler 1: Name that shape! Sonobe puzzler 2: How many units? Sonobe puzzler 3: Mirror images? Coloring … Continue reading

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This is a follow-up to Coloring Sonobe origami, part 1: proper coloring. Symmetric Coloring The most natural first polyhedra to make from the Sonobe unit are, like the octahedron, regular solids. As a result, they have lots of symmetries. Thus, … Continue reading

Posted in Combinatorics, Math, Origami
Tagged Graph theory, group theory, modular origami
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*This gallery contains 6 photos.*

Origami made from origami instructions: (The first two show a proper, symmetric 3-coloring of the octahedron with four units each of purple, teal and orange.)

One thing that was on my mind while I was composing my Sonobe puzzlers [1, 2, 3] is the question of “properly coloring” a Sonobe construction: what does it mean, when is it possible, and in how many ways can … Continue reading

Over the weekend I helped out at the Math Prize for Girls (which also has a blog), a relatively new math competition open only to female students of high school age (or younger). In particular, I and my friend MG … Continue reading

Posted in Math, Origami
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