Why hyperbolic theories of dissipation cannot be ignored:: Comment on a paper by Kostadt and Liu -: art. no. 088503

Contrary to what is asserted in a recent paper by Kostadt and Liu, experiments can (and in fact do) tell hyperbolic theories apart from parabolic theories of dissipation. It is stressed that the existence of a nonnegligible relaxation time does not imply that the system is out of the hydrodynamic regime.