"Ein Vierteljahrhundert Mathematik" (25 Years Mathematics)  by Ian Stewart, Spektrum der Wissenschaft (2003).

The Boy surface is an immersion of the projective plane, a non-orientable surface. The image enhances the structure of the self-intersection of the surface including the single triple point.

The image is used as cover image of an article by Ian Stewart in Spektrum der Wissenschaft: 25 Years Mathematics.

More on the Boy Surface: come back soon ...

© 1996-2013 Last modified: 23.04.2013 --- Konrad Polthier --- Freie Universität Berlin, Germany