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arXiv 2012.06804math.AP
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具有松弛项的双曲型方程组的锐临界阈值

Sharp critical thresholds in a hyperbolic system with relaxation

Manas Bhatnagar, Hailiang Liu

摘要:

从临界阈值现象的角度提出并研究了一个具有局部松弛的一维$2\times 2$双曲欧拉方程组。该系统具有严格双曲和弱双曲之间的动态过渡。对于不同类别的放松,我们确定内在的临界阈值的初始数据,区分全球的规律性和有限时间爆破。对于松弛独立的密度,我们估计的速度方面的系统是严格双曲的密度上的界限。

英文摘要:

We propose and study a one-dimensional $2\times 2$ hyperbolic Eulerian system with local relaxation from critical threshold phenomena perspective. The system features dynamic transition between strictly and weakly hyperbolic. For different classes of relaxation we identify intrinsic critical thresholds for initial data that distinguish global regularity and finite time blowup. For relaxation independent of density, we estimate bounds on density in terms of velocity where the system is strictly hyperbolic.

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