Heteroclinic Chaos, Chaotic Itinerancy and Neutral Attractors in   Symmetrical Replicator Equations with Mutations
  A replicator equation with mutation processes is numerically studied.   Without any mutations, two characteristics of the replicator dynamics are known: an exponential divergence of the dominance period, and hierarchical orderings of the attractors. A mutation introduces some new aspects: the emergence of structurally stable attractors, and chaotic itinerant behavior. In addition, it is reported that a neutral attractor can exist in the mutataion rate -> +0 region. 
K. Hashimoto (U. of Tokyo), T. Ikegami (U. of Tokyo)