  This paper shows that in second-order hyperbolic systems of partial
differential equations proposed in authors' earlier paper (J. Math. Phys. 59
(2018)) for modelling the relativistic dynamics of barotropic fluids in the
presence of viscosity and heat conduction, shock waves of arbitrary strength
have smooth, monotone dissipation profiles. The results and arguments extend
classical considerations of Weyl (Comm. Pure Appl. Math. 2 (1949)) and Gilbarg
(Amer. J. Math. 73 (1951)) to the relativistic setting.
