Pseudospheres

[purplecat]

Pseudospheres are basically just the hyperbolic planes I've crocheted up before only this time in a spiral. Historically they are the first shapes that were hypothesized as examples of non-euclidean surfaces with negative curvature.

Practically speaking it's difficult to know when to stop crocheting up a pseudosphere...

This entry was originally posted at http://purplecat.dreamwidth.org/29537.html.

Comments

[wellinghall.livejournal.com]

Have you seen these?
http://www.kleinbottle.com/klein_bottle_hats.htm

[purplecat]

I'd not. The book has instructions for crocheting a klein bottle, though you have to make two Mobius strips first.