Front localization in a ballistic annihilation model
  We study the possibility of localization of the front present in a one-dimensional ballistically-controlled annihilation model in which the two annihilating species are initially spatially separated. We construct two different classes of initial conditions, for which the front remains localized. 
Pierre-Antoine Rey, Michel Droz (University of Geneva) and Jaroslaw   Piasecki (Warsaw University)