Turning a Punctured Torus Inside Out
Initializing live version
Requires a Wolfram Notebook System
Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.
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.
Contributed by: Karl Scherer (March 2011)
Open content licensed under CC BY-NC-SA