Topological entropy for some isotropic cosmological models
  The chaotical dynamics is studied in different Friedmann-Robertson- Walker cosmological models with scalar (inflaton) field and hydrodynamical matter. The topological entropy is calculated for some particular cases. Suggested scheme can be easily generalized for wide class of models. Different methods of calculation of topological entropy are compared. 
A.Yu.Kamenshchik, I.M.Khalatnikov S.V.Savchenko and A.V.Toporensky