Radial spacing distributions from planar points sets
  In this paper, we explore the radial projection method for locally finite point sets and provide numerical examples for different types of order. The main question is whether the method is suitable to analyse order in a quantitive way. Our findings indicate that the answer is affermative. In this context, we also study local visibility conditions for certain types of aperiodic point sets. 
Michael Baake, Friedrich G\"otze, Christian Huck, Tobias Jakobi
math.DS math.MG