133 citations · 795 across the 60 of their papers we have counts for
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math.GR1997★ 1 cited
Some Generalizations of the Pinwheel Tiling
Lorenzo Sadun
We introduce a new family of nonperiodic tilings, based on a substitution rule that generalizes the pinwheel tiling of Conway and Radin. In each tiling the tiles are similar to a s…
math.GR1997
On 2-generator subgroups of SO(3)
Charles Radin, Lorenzo Sadun
We classify all subgroups of that are generated by two elements, each a rotation of finite order, about axes separated by an angle that is a rational multiple of . In al…
math.GR1996★ 2 cited
Subgroups of SO(3) Associated with Tilings
Charles Radin, Lorenzo Sadun
We give a thorough analysis of those subgroups of SO(3) generated by rotations about perpendicular axes by 2π/p and 2π/q. A corollary is that such a group is the free product of th…