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arXiv 1610.00566math.SG
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四维多圆盘到球的辛嵌入

Symplectic embeddings of four-dimensional polydisks into balls

Katherine Christianson, Jo Nelson

摘要:

在本文中,我们得到了新的障碍,辛嵌入的四维多圆盘$P(a,1)$到球$B(c)$的$2\leq a<\frac{\sqrt{7}-1} {\sqrt{7}-2} \approx 2.549$,扩展的工作由Hind-Lisi和Hutchings。Schlenk的折叠结构使我们可以得出结论,我们的界在$c$是最佳的。我们的证明利用了一个"凸复曲面域"辛嵌入到另一个引入的哈钦斯在\cite{Beyond}的组合标准。此外,我们证明了,如果某些辛嵌入的四维凸环面域存在,然后修改后的版本,这个标准从\cite{Beyond}必须持有,从而降低计算复杂性的原始标准从$O(2^n)$到$O(n^2)$。

英文摘要:

In this paper we obtain new obstructions to symplectic embeddings of the four-dimensional polydisk $P(a,1)$ into the ball $B(c)$ for $2\leq a<\frac{\sqrt{7}-1} {\sqrt{7}-2} \approx 2.549$, extending work done by Hind-Lisi and Hutchings. Schlenk's folding construction permits us to conclude our bound on $c$ is optimal. Our proof makes use of the combinatorial criterion necessary for one "convex toric domain" to symplectically embed into another introduced by Hutchings in \cite{Beyond}. Additionally, we prove that if certain symplectic embeddings of four dimensional convex toric domains exist then a modified version of this criterion from \cite{Beyond} must hold, thereby reducing the computational complexity of the original criterion from $O(2^n)$ to $O(n^2)$.

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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