Curves on a Sphere
Here’s a riddle from Peter Winkler‘s book “Mathematical Mind-Benders” (which is wholeheartedly recommended):
On the surface of a sphere of radius 1 lies a closed curve of length less then 
Since there are currently no readers to this probablog, there’s no reason to wait a couple of days before posting hints or solutions, beside procrastination. Well, I guess that’s a good enough reason for me.
Advertisement
[...] Following my own riddle post (OK, not really), Gil Kalai posted two math riddles. I would like to offer a variation on the ant [...]
More riddles « Almost Surely said this on October 24, 2008 at 10:34 pm |
[...] on a Sphere – the Solution Here’s the riddle and a solution. And here’s a solution fitting a [...]
Curves on a Sphere - the Solution « Almost Surely said this on October 29, 2008 at 11:24 pm |