| CVM 1.1 |
| This image represents a function that is periodic over the plane, with symmetry group given by one of the 17 wallpaper groups. The article Vibrating Wallpaper classifies all possible functions that are invariant under one of these groups, and gives recipes for generating such functions. There is an interactive program where readers can create wallpaper patterns and a gallery of movies showing vibrating wallpaper drums. |