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arXiv 1407.6449math.AP
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两个正则性损失双曲松弛模型的衰减结构

Decay structure of two hyperbolic relaxation models with regularity-loss

Yoshihiro Ueda, Renjun Duan, Shuichi Kawashima

摘要:

研究了具有非对称松弛的线性对称双曲型方程组的两种衰减结构。精确地说,系统是$(p,q)$型的,如果所有特征值的实部允许一个上界$-c|ξ|^{2p}/(1+|ξ|^2)^{q}$,其中$c$是一般的正常数,$ξ$是频率变量,并且如果$p<q$,则系统具有正则性损失性质。众所周知,标准类型$(1,1)$可以通过经典的川岛-静田条件来保证。在\cite{UDK}中引入了一个新的结构条件,用于分析具有非对称弛豫的正则性损失型$(1,2)$系统.本文构造了两个更复杂的正则性损失模型,分别对应于$p=m-3$,$q=m-2$和$p=(3m-10)/2$,$q=2(m-3)$,其中$m$表示相维数。证明是基于精细的傅立叶能量方法以及一系列能量不等式的适当的线性组合。由于任意较高的维度,它是不明显的,以捕捉相对于退化组件的能量耗散率。因此,对于每一个模型,我们总是从低相维的情况出发,以理解一般情况下的基本耗散结构,同时,我们也给出了补偿对称矩阵$K$和反对称矩阵$S$的显式构造.

英文摘要:

The paper aims at investigating two types of decay structure for linear symmetric hyperbolic systems with non-symmetric relaxation. Precisely, the system is of the type $(p,q)$ if the real part of all eigenvalues admits an upper bound $-c|ξ|^{2p}/(1+|ξ|^2)^{q}$, where $c$ is a generic positive constant and $ξ$ is the frequency variable, and the system enjoys the regularity-loss property if $p<q$. It is well known that the standard type $(1,1)$ can be assured by the classical Kawashima-Shizuta condition. A new structural condition was introduced in \cite{UDK} to analyze the regularity-loss type $(1,2)$ system with non-symmetric relaxation. In the paper, we construct two more complex models of the regularity-loss type corresponding to $p=m-3$, $q=m-2$ and $p=(3m-10)/2$, $q=2(m-3)$, respectively, where $m$ denotes phase dimensions. The proof is based on the delicate Fourier energy method as well as the suitable linear combination of series of energy inequalities. Due to arbitrary higher dimensions, it is not obvious to capture the energy dissipation rate with respect to the degenerate components. Thus, for each model, the analysis always starts from the case of low phase dimensions in order to understand the basic dissipative structure in the general case, and in the mean time, we also give the explicit construction of the compensating symmetric matrix $K$ and skew-symmetric matrix $S$.

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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