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arXiv 1105.3601math.AP
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环面上KdV和mKdV方程的尖锐不适定性结果

Sharp ill-posedness results for the KdV and mKdV equations on the torus

Luc Molinet

摘要:

我们建立了环面上mKdV方程解的$ L^2 $ -有界序列的一个新的先验界。这首先使我们能够构造弱解在$ L^2$为这个方程,并检查的“解决方案”所构造的Kappeler和Topalov在散焦的情况下满足方程在某种弱意义上。在第二次,我们证明了与mKdV和KdV方程的解映射是不连续的$ H^s(\T) $拓扑分别为$ s<0$和$ s<-1$。这些最后的结果是尖锐的。

英文摘要:

We establish a new a priori bound for $ L^2 $-bounded sequences of solutions to the mKdV equations on the torus. This first enable us to construct weak solutions in $ L^2$ for this equation and to check that the "solutions" constructed by Kappeler and Topalov in the defocusing case satisfy the equation in some weak sense. In a second time, we prove that the solution-map associated with the mKdV and the KdV equation are discontinuous for the $ H^s(\T) $ topology for respectively $ s<0$ and $ s<-1$. These last results are sharp.

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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