One of the four posters of presentation of the exhibition Un tuffo nella quarta dimensione - Diving in the 4th dimension, held in Genoa, during the Festival of Science, in 2007.
You can see another one.
elaborazione grafica di Daniela Gaggero
The image belongs to the sections...:
Posters of the exhibition (From the exhibitions of matematita)
Various matters (4D geometry)