This article is from Proof Positive, our friendly math newsletter that’s delivered to your inbox every Tuesday afternoon. Sign up today and read it first. How can you create a doughnut-shaped surface ...

Folding a flat piece of paper into a torus — a shape with a hole in the middle — demands origami skill. That’s something mathematician Richard Evan Schwartz lacks. Yet he answered a lingering ...

Most people wouldn't think that it would take rigorous mathematical proof to show how many folds it takes to make a donut shape out of paper. Yet, no one could quite figure it out until recently. In a ...

How can you create a doughnut-shaped surface from a flat sheet of paper? The most elegant solution is probably to use the art of paper folding called origami. Mathematician Richard Schwartz of Brown ...