Let be the group of symmetries which map a Monohedral Tiling onto itself. The Transitivity Class of a given tile T is then the collection of all tiles to which T can be mapped by one of the symmetries of .

**References**

Berglund, J. ``Is There a -Anisohedral Tile for ?'' *Amer. Math. Monthly* **100**, 585-588, 1993.

© 1996-9

1999-05-26