Robust convergence in pulse coupled oscillators with delays
  We show that for pulse coupled oscillators a class of phase response curves with both excitation and inhibition exhibit robust convergence to synchrony on arbitrary aperiodic connected graphs with delays. We describe the basins of convergence and give explicit bounds on the convergence times. These results provide new and more robust methods for synchronization of sensor nets and also have biological implications. 
Joel Nishimura and Eric J. Friedman
math.DS nlin.AO q-bio.QM