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arXiv 1012.4048math.APmath-phmath.MP
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薛定谔映射的条件整体正则性:阈下色散能

Conditional global regularity of Schrödinger maps: sub-threshold dispersed energy

Paul Smith

摘要:

我们考虑薛定谔映射到球的初值问题在2+1维光滑,衰减,亚阈值的初始数据。假设解的先验$L^4$有界性条件,证明了薛定谔映射系统存在唯一的整体光滑解,只要初始数据是充分能量分散的.还显示的是全球的时间上的某些Sobolev规范的解决方案。为此,我们建立了改进的局部平滑和双线性Schhartz估计,适应Planchon-Vega方法,这样的估计薛定谔映射的非线性设置。

英文摘要:

We consider the Schrödinger map initial value problem into the sphere in 2+1 dimensions with smooth, decaying, subthreshold initial data. Assuming an a priori $L^4$ boundedness condition on the solution, we prove that the Schrödinger map system admits a unique global smooth solution provided that the initial data is sufficiently energy-dispersed. Also shown are global-in-time bounds on certain Sobolev norms of the solution. Toward these ends we establish improved local smoothing and bilinear Strichartz estimates, adapting the Planchon-Vega approach to such estimates to the nonlinear setting of Schrödinger maps.

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