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arXiv 1701.00293math.CVmath.DG
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Diederich-Fornæss指标I:对于非平凡指标的域

The Diederich-Fornæss index I: for domains of non-trivial index

Bingyuan Liu

摘要:

研究复欧几里得空间中有界伪凸域。我们定义了一个与边界相关联的指数,并证明了这个新指数与1977年定义的Diederich-Fornæss指数是等价的。这将Diederich-Fornæss指标与边界条件联系起来,并改进了Levi伪凸性。我们还证明了$β$ -蠕虫域的索引为$π/{(2β)}$ .首次得到了欧几里得空间中精确的非平凡Diederich-Fornæss指标.这一发现也表明,Diederich-Fornæss指数是一个连续的$(0,1]$,而不是一个离散集。证明的思想涉及一个新的复杂的几何分析技术的边界和详细的估计微分方程。

英文摘要:

We study bounded pseudoconvex domains in complex Euclidean space. We define an index associated to the boundary and show this new index is equivalent to the Diederich-Fornæss index defined in 1977. This connects the Diederich-Fornæss index to boundary conditions and refines the Levi pseudoconvexity. We also prove the $β$-worm domain is of index $π/{(2β)}$. It is the first time that a precise non-trivial Diederich-Fornæss index in Euclidean spaces is obtained. This finding also indicates that the Diederich-Fornæss index is a continuum in $(0,1]$, not a discrete set. The ideas of proof involve a new complex geometric analytic technique on the boundary and detailed estimates on differential equations.

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