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arXiv 0712.3288math.AP
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关于Euler方程弱解的容许准则

On admissibility criteria for weak solutions of the Euler equations

Camillo De Lellis, László Székelyhidi

摘要:

我们考虑解的Cauchy问题的不可压缩欧拉方程满足几个额外的要求,如全球和当地的能量不等式。使用一些技术介绍了在较早的文件中,我们表明,对于一些有界紧支持的初始数据,没有这些容许性标准挑出一个独特的弱解。作为一个副产品,我们显示有界的初始数据,可采纳解的欧拉坐标系中的等熵气体动力学的p-系统不是唯一的,在一个以上的空间维度。

英文摘要:

We consider solutions to the Cauchy problem for the incompressible Euler equations satisfying several additional requirements, like the global and local energy inequalities. Using some techniques introduced in an earlier paper we show that, for some bounded compactly supported initial data, none of these admissibility criteria singles out a unique weak solution. As a byproduct we show bounded initial data for which admissible solutions to the p-system of isentropic gas dynamics in Eulerian coordinates are not unique in more than one space dimension.

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