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arXiv 1404.5380math.GT
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Lefschetz铅笔和非线性呈现群

Lefschetz pencils and finitely presented groups

Ryoma Kobayashi, Naoyuki Monden

摘要:

本文给出了一个新的群$Γ$,通过对Cadavid和Korkmaz独立构造的Lefschetz纤维化的“扭曲替换”,给出了具有$(-1)$ -截面的Lefschetz纤维化的显式单值性,该截面的全空间具有基本群$Γ$.因此,我们得到了最小$g$的一个上界,使得在基本群同构于$Γ$的光滑4-流形上存在亏格-$g$ Lefschetz束。

英文摘要:

In this paper, given a finitely presented group $Γ$, we provide the explicit monodromy of a Lefschetz fibration with $(-1)$-sections whose total space has fundamental group $Γ$ by applying "twisted substitutions" to that of the Lefschetz fibration constructed by Cadavid and independently Korkmaz. Consequently, we obtain an upper bound for the minimum $g$ such that there exists a genus-$g$ Lefschetz pencil on a smooth 4-manifold whose fundamental group is isomorphic to $Γ$.

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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