200808 - pgg
Copyright 2008 S.Monnier
|This image is part of a series of 17 images, displaying patterns with the symmetries of the 17 wallpaper groups.
This is the group pgg, which contains two families of glide relfection axes, perpendicular to each other. In this image, they are vertical and horizontal. Between the axes, there are order 2 rotation centers. (The symmetry is slightly broken by the circular central part of the image...)