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arXiv 2409.09897math.CVmath.DG
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四元数单位球的切片正则Möbius变换的几何

Geometry of the slice regular Möbius transformations of the quaternionic unit ball

Raul Quiroga-Barranco

AI总结:

本文研究四元数单位球的切片正则Möbius变换集合,通过将其实现为李群Sp(1,1)的商引入光滑流形结构,证明该流形与R^4×S^3微分同胚。

摘要:

对于四元数单位球$\mathbb{B}$,我们记$\mathcal{M}(\mathbb{B})$为将$\mathbb{B}$映射到自身的切片正则Möbius变换的集合。我们在$\mathcal{M}(\mathbb{B})$上引入一个光滑流形结构,使得$\mathcal{M}(\mathbb{B})$在$\mathbb{B}$上的求值(作用)映射是光滑的。$\mathcal{M}(\mathbb{B})$上考虑的流形结构通过将该集合实现为李群$\mathrm{Sp}(1,1)$的商来获得。此外,结果表明$\mathbb{B}$也是$\mathcal{M}(\mathbb{B})$和$\mathrm{Sp}(1,1)$两者的商。这些商是在主纤维丛的意义下。流形$\mathcal{M}(\mathbb{B})$与$\mathbb{R}^4 \times S^3$微分同胚。

英文摘要:

For the quaternionic unit ball $\mathbb{B}$, let us denote by $\mathcal{M}(\mathbb{B})$ the set of slice regular Möbius transformations mapping $\mathbb{B}$ onto itself. We introduce a smooth manifold structure on $\mathcal{M}(\mathbb{B})$, for which the evaluation(-action) map of $\mathcal{M}(\mathbb{B})$ on $\mathbb{B}$ is smooth. The manifold structure considered on $\mathcal{M}(\mathbb{B})$ is obtained by realizing this set as a quotient of the Lie group $\mathrm{Sp}(1,1)$, Furthermore, it turns out that $\mathbb{B}$ is a quotient as well of both $\mathcal{M}(\mathbb{B})$ and $\mathrm{Sp}(1,1)$. These quotients are in the sense of principal fiber bundles. The manifold $\mathcal{M}(\mathbb{B})$ is diffeomorphic to $\mathbb{R}^4 \times S^3$.

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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