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arXiv 1709.03359math.GT
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某些高阶Euler类的无界性

Unboundedness of some higher Euler classes

Kathryn Mann

摘要:

本文研究了Seifert纤维3-流形的同胚群中的Euler类。我们发现,在熟悉的欧拉类$\mathrm{Homeo}_0(S^1)^δ$,这些欧拉类$\mathrm{Homeo}_0(M^3)^δ$是无界类。事实上,我们给出了亏格为3的曲面上的平坦拓扑M丛的例子,其Euler类取任意值。

英文摘要:

In this paper, we study Euler classes in groups of homeomorphisms of Seifert fibered 3-manifolds. We show that, in contrast to the familiar Euler class for $\mathrm{Homeo}_0(S^1)^δ$, these Euler classes for $\mathrm{Homeo}_0(M^3)^δ$ are unbounded classes. In fact, we give examples of flat topological M bundles over a genus 3 surface whose Euler class takes arbitrary values.

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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