symmetry of scale: A pattern in the plane is
scalable (or has symmetry of scale) if the tiles
that make up the pattern can be grouped into
super-tiles that still cover the plane, and, if scaled
down, coincide with the original pattern.
"Super-tiles" -- small tiles placed together to make
larger copies of themselves.
Penrose Rhomb
pattern ("new P3"): "[the diamonds] occur with the same
frequencies (the ratio of thick to thin is the Golden Number (1 +
sqrt(5))/2, which is also the ratio of their areas)...."
(source: Tilings,
Diffraction, and Quasicrystals)
