How to get a bitorus from a decagon: this is the fifth step. Here you can see the fourth s...
How to get a bitorus from a decagon: this is the sixth step. Here you can see the seventh ...
How to get a bitorus from a decagon: this is the last step. Here you can see the preceedin...
This map of Milan of the sixteenth century is a rough decagon. If we identify some sides o...
The first step of the deformation that transforms a map of Milan of the sixteenth century ...
A step of the deformation that transforms a map of Milan of the sixteenth century (which i...
The animation shows how to get a Klein bottle from a square by identifying the couples of ...
This map of Milan of the sixteenth century is a rough decagon. If we identify some sides o...
This interactive animation shows the various surfaces that can be obtained from a rectangl...
We get a Moebius strip by taking a long rectangle and pasting the two shortest sides after...
