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arXiv 0810.2862math.APmath-phmath.MP
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各向异性退化抛物-双曲型方程周期熵解的大时间性态

Large-Time Behavior of Periodic Entropy Solutions to Anisotropic Degenerate Parabolic-Hyperbolic Equations

Gui-Qiang Chen, Benoit Perthame

摘要:

本文研究了二阶各向异性退化抛物-双曲型方程的$L^\infty$中周期熵解的大时间行为。与纯双曲情形不同,非线性方程不再是自相似不变的,并且方程中的扩散项显著影响解的大时间行为;因此早期基于自相似标度的方法不直接适用。本文发展了另一种建立各向异性退化抛物-双曲型方程周期解衰减性的方法。证明是基于熵解的动力学公式。它涉及时间平移和熵解的时间单调性,并采用精确的动力学方程的解决方案的优点,以认识到方程的非线性扩散的作用。

英文摘要:

We are interested in the large-time behavior of periodic entropy solutions in $L^\infty$ to anisotropic degenerate parabolic-hyperbolic equations of second-order. Unlike the pure hyperbolic case, the nonlinear equation is no longer self-similar invariant and the diffusion term in the equation significantly affects the large-time behavior of solutions; thus the approach developed earlier based on the self-similar scaling does not directly apply. In this paper, we develop another approach for establishing the decay of periodic solutions for anisotropic degenerate parabolic-hyperbolic equations. The proof is based on the kinetic formulation of entropy solutions. It involves time translations and a monotonicity-in-time property of entropy solutions, and employs the advantages of the precise kinetic equation for the solutions in order to recognize the role of nonlinearity-diffusivity of the equation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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