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arXiv 1306.2763math.AP
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二维零耗散磁流体力学系统整体正则性的注记

Remarks on the global regularity of two-dimensional magnetohydrodynamics system with zero dissipation

Kazuo Yamazaki

摘要:

研究了具有广义耗散和扩散的二维广义磁流体动力学系统。我们知道,在耗散项和扩散项都是满拉普拉斯算子的经典磁流体力学系统存在唯一的整体强解对。利用二维情况下系统的特殊结构,我们特别证明了当耗散为零但只有具有分数拉普拉斯$β> \frac{3}{2}$幂的磁扩散时,解对保持光滑。

英文摘要:

We study the two-dimensional generalized magnetohydrodynamics system with generalized dissipation and diffusion in terms of fractional Laplacians. It is known that the classical magnetohydrodynamics system with full Laplacians in both dissipation and diffusion terms admits a unique global strong solution pair. Making use of the special structure of the system in the two-dimensional case, we show in particular that the solution pair remains smooth when we have zero dissipation but only magnetic diffusion with its power of the fractional Laplacian $β> \frac{3}{2}$.

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