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arXiv 0907.4216math.CA
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关于曲率和双线性乘子问题

On curvature and the bilinear multiplier problem

S. Zubin Gautam

摘要:

我们在域$D \subset \BBR^4$的边界上提供了充分的法曲率条件,以保证符号$χ_D$在局部$L^2$设置\textit{i.e}之外的双线性傅立叶乘子算子$\T_D$的无界性。从$L^{p_1} (\BBR^2) \times L^{p_2} (\BBR^2) \to L^{p_3'} (\BBR^2)$与$\sum \frac{1}{p_j} = 1$和$p_j <2$(对于某些$j$)。特别是,这些曲率条件满足任何域$D$,是局部严格凸的一个单一的边界点。

英文摘要:

We provide sufficient normal curvature conditions on the boundary of a domain $D \subset \BBR^4$ to guarantee unboundedness of the bilinear Fourier multiplier operator $\T_D$ with symbol $χ_D$ outside the local $L^2$ setting, \textit{i.e}. from $L^{p_1} (\BBR^2) \times L^{p_2} (\BBR^2) \to L^{p_3'} (\BBR^2)$ with $\sum \frac{1}{p_j} = 1$ and $p_j <2$ for some $j$. In particular, these curvature conditions are satisfied by any domain $D$ that is locally strictly convex at a single boundary point.

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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