Jason (jcreed) wrote,
Jason
jcreed

In the mid-90s, some awesome nerds at the University of Minnesota made a video called "Outside In" that describes a rather surprising theorem due to Smale in 1957 that you can smoothly turn a sphere inside out without puncturing it, as long as you allow self-intersection. It has a lot of neat visualizations, and you can see it on Google Video here.
Tags: math, spheres
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