Two great tastes that taste great together. Complex mathematics and crochet!:)

"Geometry teachers usually try to explain the hyperbolic plane via flat models that wildly distort its geometry—making lines look like semicircles, for instance. How, Taimina wondered, could she give her students a feel for hyperbolic geometry's counterintuitive properties? While attending a workshop, the answer came to her: Crochet a piece of hyperbolic fabric...."

tori, Lorenz manifolds, hyperbolic planes and Yarn? ohmY

(thanks mummimamma)!