Qualitative Viscous Cosmology
  The Full (non--truncated) Israel--Stewart theory of bulk viscosity is applied to dissipative FRW spacetimes. Dimensionless variables and dimensionless equations of state are used to write the Einstein--thermodynamic equations as a plane autonomous system and the qualitative behaviour of this system is determined. Entropy production in these models is also discussed. 
A.A. Coley, R.J. van den Hoogen (Dept. of Math, Stats, and Computing   Science, Dalhousie University) R. Maartens (School of...