A surface
A surface whose border is a torus knot of type (4,3); here we can see an embedding in the three-dimensional space with some self-intersection, some "holes" are created to show what happens.
© matematita
immagine di Gian Marco Todesco
The image belongs to the sections...:
Other surfaces (Topology)
Tori and other surfaces (From the exhibitions of matematita)
Further information:
http://www.toonz.com/personal/todesco
