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arXiv math/0605575math.AP
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由实粘性消失近似导出的边界黎曼解算子

The boundary Riemann solver coming from the real vanishing viscosity approximation

S. Bianchini, L. V. Spinolo

摘要:

本文研究了一类混合双曲-抛物方程组的初边值问题:v^ε _t + A(v^ε,εv^ε_x)v^ε_x = εB(v^ε)v^ε_{xx}特别地,保守情形包含在前面的公式中.我们假设这些问题的解$v^ε$收敛到一个唯一的极限。此外,它假定小的全变差和其他技术假设,并提供了一个完整的表征的限制。最有趣的是以下两点。首先,考虑边界特征情况,即$A$的一个特征值可以是$0$。其次,我们考虑到$B$不可逆的可能性。为了处理这种情况下,我们作为假设条件,介绍了川岛和静田依赖于物理意义的例子。我们还引入了一个新的块线性退化条件。我们证明,如果不满意,那么可能会发生病理行为。

英文摘要:

We study a family of initial boundary value problems associated to mixed hyperbolic-parabolic systems: v^ε _t + A (v^ε, εv^ε_x ) v^ε_x = εB (v^ε ) v^ε_{xx} The conservative case is, in particular, included in the previous formulation. We suppose that the solutions $v^ε$ to these problems converge to a unique limit. Also, it is assumed smallness of the total variation and other technical hypotheses and it is provided a complete characterization of the limit. The most interesting points are the following two. First, the boundary characteristic case is considered, i.e. one eigenvalue of $A$ can be $0$. Second, we take into account the possibility that $B$ is not invertible. To deal with this case, we take as hypotheses conditions that were introduced by Kawashima and Shizuta relying on physically meaningful examples. We also introduce a new condition of block linear degeneracy. We prove that, if it is not satisfied, then pathological behaviours may occur.

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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