18 October 2017 By yarosd Go and read the last – editor suggested – paper of Eli Levy (Phys. Rev. Lett.) A. Dareau, E. Levy, M. Bosch Aguilera, R. Bouganne, E. Akkermans, F. Gerbier, J. Beugnon, “Revealing the Topology of Quasicrystals with a Diffraction Experiment,” Phys. Rev. Lett. 119, 215304 (2017).