Turning a Sphere Inside Out · 1979
Turning a Sphere Inside Out (1979) is a Documentary film directed by Nelson Max, starring Nelson Max, Stephen Smale, Charles Pugh.
Documentary
Overview
This video is about the problem of turning a sphere inside out, by passing the surface through itself, without making any holes or creases. Mathematicians believed the problem to be unsolvable until 1958, when Stephen Smale proved otherwise. The motion of turning a sphere inside out, called a regular homotopy, is extremely difficult to visualize. The homotopy in this film was developed by Bernard Morin, a blind mathematician. The motion is illustrated with a sequence of chicken-wire models, built by Charles Pugh, showing the crucial stages in the motion. Commentary is provided by mathematicians Nelson L. Max, Stephen Smale, and Charles Pugh, and by physicist Judith Bregmann.
Cast
Nelson Max, Stephen Smale, Charles Pugh, Judith Bregman
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What is "Turning a Sphere Inside Out" about?
This video is about the problem of turning a sphere inside out, by passing the surface through itself, without making any holes or creases. Mathematicians believed the problem to be unsolvable until 1958, when Stephen Smale proved otherwise. The motion of turning a sphere inside out, called a regular homotopy, is extremely difficult to visualize. The homotopy in this film was developed by Bernard Morin, a blind mathematician. The motion is illustrated with a sequence of chicken-wire models, built by Charles Pugh, showing the crucial stages in the motion. Commentary is provided by mathematicians Nelson L. Max, Stephen Smale, and Charles Pugh, and by physicist Judith Bregmann.
When was "Turning a Sphere Inside Out" released?
Turning a Sphere Inside Out was released in 1979.
Who stars in "Turning a Sphere Inside Out"?
The cast includes Nelson Max, Stephen Smale, Charles Pugh, Judith Bregman.
