purplecat: Hand Drawn picture of a Toy Cat (Default)
purplecat ([personal profile] purplecat) wrote2010-12-20 05:33 pm

Pseudospheres







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.

[identity profile] bigtitch.livejournal.com 2010-12-20 05:53 pm (UTC)(link)
They're very pretty.

Practically speaking it's difficult to know when to stop crocheting up a pseudosphere...
Ah yes, classically the only limits to non-euclidean geometry has always been the supply of yarn.. ;)

[identity profile] lukadreaming.livejournal.com 2010-12-20 05:56 pm (UTC)(link)
I remember what negative curvature is!

[identity profile] wellinghall.livejournal.com 2010-12-20 06:18 pm (UTC)(link)
Have you seen these?
http://www.kleinbottle.com/klein_bottle_hats.htm
fredbassett: (Default)

[personal profile] fredbassett 2010-12-20 07:57 pm (UTC)(link)
I just keep wondering wht you're going to do with them all!

[identity profile] wellinghall.livejournal.com 2010-12-22 09:36 pm (UTC)(link)
And then there's this ...

http://www.etsy.com/listing/33976760/two-headed-black-snake-scarf?ref=sr_gallery_1&ga_search_query=snake+two+headed&ga_search_type=handmade&ga_page=&order=&includes[0]=tags&includes[1]=title&filter[0]=handmade