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arXiv 2005.06765math.GTmath.CO
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多分支曲面的最大亏格和最小亏格

The maximum and minimum genus of a multibranched surface

Mario Eudave-Munoz, Makoto Ozawa

摘要:

本文分别利用第一贝蒂数和邻域边界的最小亏格、最大亏格给出了多枝曲面的最大亏格、最小亏格的一个下界.作为应用,我们证明了对于图$G$,$G\times S^1$的最大亏格和最小亏格分别等于$G$的最大亏格和最小亏格的两倍.这提供了图论和3-流形理论之间的相互作用。

英文摘要:

In this paper, we give a lower bound for the maximum and minimum genus of a multibranched surface by the first Betti number and the minimum and maximum genus of the boundary of the neighborhood of it, respectively. As its application, we show that the maximum and minimum genus of $G\times S^1$ is equal to twice of the maximum and minimum genus of $G$ for a graph $G$, respectively. This provides an interplay between graph theory and 3-manifold theory.

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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