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arXiv 0809.3835math.APmath-phmath.MP
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能量范数下径向三维NLKG散射的介绍

Introduction to scattering for radial 3D NLKG below energy norm

Tristan Roy

摘要:

本文证明了径向非线性Klein-Gordon方程$ \partial_{tt} u - Δu + u = -|u|^{p-1} u $与$5 > p >3$和数据$ (u_{0}, u_{1}) \in H^{s} \times H^{s-1} $的散射,当$ 4 \geq p > 3 $时为$ 1 > s > 1- \frac{(5-p)(p-3)}{2(p-1)(p-2)} $,当$ 5> p \geq 4$时为$ 1 > s > 1 - \frac{(5-p)^{2}}{2(p-1)(6-p)}$.首先证明了$ L_{t}^{q} L_{x}^{r} $空间中的Escherhartz型估计。然后利用这些衰变建立一些局部界。通过将这些结果与Morawetz型估计和径向Sobolev不等式相结合,我们控制了几乎守恒量在任意大的区间上的变化。一旦我们证明了这个量是受控的,我们就证明了这些局部界限中的一些可以升级为全局界限。这就足以建立散射。由于非线性的性质和缺乏尺度,所有涉及的估计都需要进行细致的分析。

英文摘要:

We prove scattering for the radial nonlinear Klein-Gordon equation $ \partial_{tt} u - Δu + u = -|u|^{p-1} u $ with $5 > p >3$ and data $ (u_{0}, u_{1}) \in H^{s} \times H^{s-1} $, $ 1 > s > 1- \frac{(5-p)(p-3)}{2(p-1)(p-2)} $ if $ 4 \geq p > 3 $ and $ 1 > s > 1 - \frac{(5-p)^{2}}{2(p-1)(6-p)}$ if $ 5> p \geq 4$. First we prove Strichartz-type estimates in $ L_{t}^{q} L_{x}^{r} $ spaces. Then by using these decays we establish some local bounds. By combining these results with a Morawetz-type estimate and a radial Sobolev inequality we control the variation of an almost conserved quantity on arbitrarily large intervals. Once we have showed that this quantity is controlled, we prove that some of these local bounds can be upgraded to global bounds. This is enough to establish scattering. All the estimates involved require a delicate analysis due to the nature of the nonlinearity and the lack of scaling.

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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