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Stability criteria for linear Hamiltonian systems with uncertain bounded periodic coefficients
Asymptotics toward strong rarefaction waves for $2\times 2$ systems of viscous conservation laws
| 1. | Department of Mathematics, City University of Hong Kong, Kowloon, Hong Kong |
| 2. | School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China |
$u_t+F(u)_x=(B(u)u_x)_x,\quad u\in R^2,\qquad $ ($*$)
$u(0,x)=u_0(x)\rightarrow u_\pm\quad$ as $x\rightarrow \pm\infty.$
Assume that the corresponding Riemann problem
$u_t+F(u)_x=0,$
$ u(0,x)=u^r_0(x)=u_-,\quad x<0, and u_+,\quad x>0$
can be solved by one rarefaction wave. If $u_0(x)$ in ($*$) is a small perturbation of an approximate rarefaction wave constructed in Section 2, then we show that the Cauchy problem ($*$) admits a unique global smooth solution $u(t,x)$ which tends to $ u^r(t,x)$ as the $t$ tends to infinity. Here, we do not require $|u_+ - u_-|$ to be small and thus show the convergence of the corresponding global smooth solutions to strong rarefaction waves for $2\times 2$ viscous conservation laws.
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