Stability of $L^\infty$ solutions for hyperbolic systems with coinciding shocks and rarefactions

Details Stability of $L^\infty$ solutions for hyperbolic systems with coinciding shocks and rarefactions Stability of $L^\infty$ solutions for hyperbolic systems with coinciding shocks and rarefactions

2000-06-13

arxiv.org/abs/math/0006094v1

Mathematics

Analysis of PDEs

19 pages, 13 figures

Scientific paper

We consider a hyperbolic system of conservation laws u_t + f(u)_x = 0 and u(0,\cdot) = u_0, where each characteristic field is either linearly degenerate or genuinely nonlinear. Under the assumption of coinciding shock and rarefaction curves and the existence of a set of Riemann coordinates $w$, we prove that there exists a semigroup of solutions $u(t) = \mathcal{S}_t u_0$, defined on initial data $u_0 \in L^\infty$. The semigroup $\mathcal{S}$ is continuous w.r.t. time and the initial data $u_0$ in the $L^1_{\text{loc}}$ topology. Moreover $\mathcal{S}$ is unique and its trajectories are obtained as limits of wave front tracking approximations.

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