klein bottle

[cellio]

For his birthday I bought Dani a klein bottle. It was a definite hit. :-) The documentation it came with was well-done, too -- definitely as entertaining as the bottle itself. (Why yes, of course I read the paperwork and carefully inspected the bottle before wrapping it up for him. :-) )
The web site is lots of fun too. Be sure to check

Comments

[magid]

Oh, that's excellent!

[nsingman]

Cool!! I really should get one. It's something every mathematician ought to have. :-)

[cellio]

It's something every mathematician ought to have. :-)

You bet!

[gnomi]

sethg_prime and lucretia_borgia got me one for my birthday a number of years ago. I love it; it makes a wonderful conversation piece.

Be careful

[anonymous]

Fourth-dimensional accidents can be tragic.

A mathematician confided
That a Mobius band is one-sided.
He said "You'll get quite a laugh
If you cut one in half
For it stays in one piece when divided!"

A mathematician named Klein
Thought the Mobius band was divine.
He said "If you glue
The edges of two
You'll get a weird bottle like mine!"

Re: Be careful

[cellio]

Fourth-dimensional accidents can be tragic.

They sure can. That's probably why the order form asked me to specify the number of dimensions in my universe (really!), and why it came with certain disclaimers.

[alice_curiouser]

It would be wrong to point out what a righteous bong could be made with one of those, huh?

[cellio]

I suppose some would consider it wrong, were someone to suggest such a thing.

[alice_curiouser]

Oh, okay. I won't, then. ;)