Detectability thresholds of general modular graphs
  We investigate the detectability thresholds of various modular structures in the stochastic block model. Our analysis reveals how the detectability threshold is related to the details of the modular pattern, including the hierarchy of the clusters. We show that certain planted structures are impossible to infer regardless of their fuzziness. 
Tatsuro Kawamoto and Yoshiyuki Kabashima
cs.SI physics.soc-ph