[another SBG contribution trapped by the mystery mail filter -- rich] ----------- Date: Wed, 21 Apr 2010 15:46:57 -0700 Subject: Re: [math-fun] Trying to recall funny shape From: "Stephen B. Gray" <stevebg@roadrunner.com> To: math-fun@mailman.xmission.com On 4/21/2010 12:50 PM, Dan Asimov wrote:
I recently read of an odd solid shape, with I think an odd name, that has recently been defined. It may be this:
Take a solid cylinder whose diameter equals its height, cut it in half along a square, rotate one half 90 degrees, and glue the halves back together again.
Does this shape have a name, or is there something similar that does? Apparently it has very interesting rolling behavior.
--Dan
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