Abstract
The asymptotic stability of traveling wave solutions with shock profile is considered for scalar viscous conservation lawsu t +f(u) x =μu xx with the initial datau 0 which tend to the constant statesu ± asx→±∞. Stability theorems are obtained in the absence of the convexity off and in the allowance ofs (shock speed)=f′(u ±). Moreover, the rate of asymptotics in time is investigated. For the casef′(u+)<s<f′(u−), if the integral of the initial disturbance over (−∞,x) is small and decays at the algebraic rate as |x|→∞, then the solution approaches the traveling wave at the corresponding rate ast→∞. This rate seems to be almost optimal compared with the rate in the casef=u 2/2 for which an explicit form of the solution exists. The rate is also obtained in the casef′(u ± =s under some additional conditions. Proofs are given by applying an elementary weighted energy method to the integrated equation of the original one. The selection of the weight plays a crucial role in those procedures.
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Communicated by S.-T. Yau
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Matsumura, A., Nishihara, K. Asymptotic stability of traveling waves for scalar viscous conservation laws with non-convex nonlinearity. Commun.Math. Phys. 165, 83–96 (1994). https://doi.org/10.1007/BF02099739
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DOI: https://doi.org/10.1007/BF02099739