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Global analysis of smooth solutions to a hyperbolic-parabolic coupled system |
Yinghui ZHANG1,2(), Haiying DENG3, Mingbao SUN1 |
1. Department of Mathematics, Hunan Institute of Science and Technology, Yueyang 414006, China; 2. School of Mathematics and Statistics, Central China Normal University, Wuhan 430079, China; 3. Department of Mathematics, Hunan First Normal College, Changsha 410205, China |
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Abstract We investigate a model arising from biology, which is a hyperbolicparabolic coupled system. First, we prove the global existence and asymptotic behavior of smooth solutions to the Cauchy problem without any smallness assumption on the initial data. Second, if the Hs∩L1-norm of initial data is sufficiently small, we also establish decay rates of the global smooth solutions. In particular, the optimal L2 decay rate of the solution and the almost optimal L2 decay rate of the first-order derivatives of the solution are obtained. These results are obtained by constructing a new nonnegative convex entropy and combining spectral analysis with energy methods.
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Keywords
Global analysis
hyperbolic-parabolic system
decay rate
convex entropy
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Corresponding Author(s):
ZHANG Yinghui,Email:zhangyinghui0910@126.com
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Issue Date: 01 December 2013
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