CRITICAL-BEHAVIOR OF NONEQUILIBRIUM 3-STATE SYSTEMS

The phase diagram of two different non-equilibrium three-state systems is here studied by means Of MFRG and computer simulations; critical e xponents are obtained by a finite-size scaling analysis of the mc data . A symmetry argument used by Grinstein et al to predict the critical behaviour of two-state non-equilibrium systems (with up-down symmetry) is shown to apply to these three-state systems (with symmetry of inte rchange between two of those states).