Asymptotic stability of a composite wave of two viscous shock waves for a one-dimensional system of non-viscous and heat-conductive ideal gas

This paper is concerned with the asymptotic stability of a composite wave consisting of two viscous shock waves to the Cauchy problem for a one-dimensional system of heat-conductive ideal gas without viscosity. We extend the results by Huang and Matsumura [2] where they treated the equation of viscous and heat-conductive ideal gas. That is, even for the non-viscous and heat-conductive case, we show that if the strengths of the viscous shock waves are suitably small with same order and also the initial perturbation is suitably small, the unique global solution in time exists and asymptotically tends toward the corresponding composite wave whose spacial shifts of two viscous shock waves are uniquely determined by the initial perturbation.