Generalised hydrodynamic reductions of the kinetic equation for soliton   gas
  We derive generalised multi-flow hydrodynamic reductions of the nonlocal kinetic equation for a soliton gas and investigate their structure. These reductions not only provide further insight into the properties of the new kinetic equation but also could prove to be representatives of a novel class of integrable systems of hydrodynamic type, beyond the conventional semi-Hamiltonian framework. 
Gennady A. El, Maxim V. Pavlov, Vladimir B. Taranov
nlin.SI math-ph math.MP