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arXiv 2009.05928math.GTmath.AT
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关于有理同调球面到欧几里得空间的特殊通有映射

On special generic maps of rational homology spheres into Euclidean spaces

Dominik Wrazidlo

摘要:

特殊类属映射是指光滑流形之间的光滑映射,它们的奇点只有确定的折叠点。关于闭$n$ -流形是否允许$1 \leq p \leq n$的特殊类属映射进入欧氏$p$ -空间的问题,有几位作者进行了研究,包括Burlet,de Rham,Porto,Furuya,Zerliašberg,Saeki和Sakuma。本文研究了$p<n$的有理同调$n$ -球面,它允许特殊的一般映射到$\mathbb{R}^{p}$中.我们使用Stein分解的技巧导出了奇$n$存在这种映射的一个必要同调条件。本文研究了$S^{4}$上包含透镜空间和线性$S^{3}$ -丛全空间的具体有理同调球面的条件,得到了特殊一般映射存在(不存在)的新结果.

英文摘要:

Special generic maps are smooth maps between smooth manifolds with only definite fold points as their singularities. The problem of whether a closed $n$-manifold admits a special generic map into Euclidean $p$-space for $1 \leq p \leq n$ was studied by several authors including Burlet, de Rham, Porto, Furuya, Èliašberg, Saeki, and Sakuma. In this paper, we study rational homology $n$-spheres that admit special generic maps into $\mathbb{R}^{p}$ for $p<n$. We use the technique of Stein factorization to derive a necessary homological condition for the existence of such maps for odd $n$. We examine our condition for concrete rational homology spheres including lens spaces and total spaces of linear $S^{3}$-bundles over $S^{4}$, and obtain new results on the (non-)existence of special generic maps.

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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