Monday, July 26, 2010

Turning a sphere inside out

I first encountered the problem of turning the sphere inside out in a class on knot theory some time ago. At the time I saw just a small clip of the procedure they show in this video but I didn't really understand exactly what was going on, I just thought the video was cool. I ran across this video quite a while ago and I must say it is extremely entertaining and they explain the problem very well.

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