From a rectangle to a torus
By identifying the opposite sides of a rectangle you get a torus. See also the interactive animation From the rectangle to....
© matematita
immagine di Gian Marco Todesco
The image belongs to the sections...:
The torus (Topology)
Images from the topology section (From the exhibitions of matematita)
Surfaces obtained from a rectangle (Topology)
Further information:
http://www.toonz.com/personal/todesco
