Review 5.Additive bivalent models x+1=∑S,Oy5)m:+1 y=∑S,(x)m,+1 Lyapunov Functions Cannot find a lyapunov function,nothing follows; Can find a lyapunov function,stability holds.5.Additive bivalent models   = + = + + + n i ij j k i i k j p j ji i k j j k i y S x m I x S y m I ( ) ( ) 1 1 Lyapunov Functions Cannot find a lyapunov function,nothing follows; Can find a lyapunov function,stability holds. Review