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arXiv 1012.3760math.CA
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基于多线性估计的振荡积分算子的界

Bounds on oscillatory integral operators based on multilinear estimates

Jean Bourgain, Larry Guth

摘要:

我们应用Bennett-Carbery-Tao多线性约束估计来约束算子和更一般的振荡积分算子。我们得到了改进的L^p估计在Stein限制问题的尺寸至少为5和一个小的改进,在3维。当相函数中的二次项为正定时,我们证明了Hormander型振荡积分算子的类似估计,在维数至少为5的情况下得到了改进。我们还证明了估计Hormander型振荡积分运营商在偶数维。这些最后的振荡估计有关的改进边界的尺寸弯曲Kakeya集在偶数维。

英文摘要:

We apply the Bennett-Carbery-Tao multilinear restriction estimate in order to bound restriction operators and more general oscillatory integral operators. We get improved L^p estimates in the Stein restriction problem for dimension at least 5 and a small improvement in dimension 3. We prove similar estimates for Hormander-type oscillatory integral operators when the quadratic term in the phase function is positive definite, getting improvements in dimension at least 5. We also prove estimates for Hormander-type oscillatory integral operators in even dimensions. These last oscillatory estimates are related to improved bounds on the dimensions of curved Kakeya sets in even dimensions.

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