M\"{o}bius disjointness for topological models of ergodic systems with   discrete spectrum
  We provide a criterion for a point satisfying the required disjointness condition in Sarnak's M\"obius Disjointness Conjecture. As a direct application, we have that the conjecture holds for any topological model of an ergodic system with discrete spectrum. 
Wen Huang, Zhiren Wang, Guohua Zhang
math.DS math.NT