Turning a Punctured Torus Inside Out

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A punctured torus can be turned inside out like a glove. During such a topological procedure any areas can be stretched and squeezed, but not ripped or joined.

External Links

Torus (Wolfram MathWorld)

Permanent Citation

Karl Scherer
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​"Turning a Punctured Torus Inside Out"​
​http://demonstrations.wolfram.com/TurningAPuncturedTorusInsideOut/​
​Wolfram Demonstrations Project​
​Published: March 7, 2011