Steady and self similar full Euler flow
  We consider solutions to the full (non-isentropic) two-dimensional Euler equations that are constant in time and along rays emanating from the origin. We prove that for a polytropic equation of state, entropy admissible solutions in $L^\infty$ with non-vanishing velocity, density, and internal energy must be $BV$. Moreover, we obtain some results concerning the structure of such solutions. 
Joseph Roberts
math.AP