Opinion groups formation and dynamics : structures that last from non   lasting entities
  We extend simple opinion models to obtain stable but continuously evolving communities. Our scope is to meet a challenge raised by sociologists of generating "structures that last from non lasting entities". We achieve this by introducing two kinds of noise on a standard opinion model. First, agents may interact with other agents even if their opinion difference is large. Second, agents randomly change their opinion at a constant rate. We show that for a large range of control parameters, our model yields stable and fluctuating polarized states, where the composition and mean opinion of the emerging groups is fluctuating over time. 
S\'ebastian Grauwin (ENS / LIP Laboratoire de l'Informatique du   Parall\'elisme / INRIA Grenoble Rh\^one-Alpes, IXXI, Phys-...
physics.soc-ph cs.SI