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arXiv math/0609411math.GT
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拓扑极小亏格与$L^2$ -签名

Topological minimal genus and $L^2$-signatures

Jae Choon Cha

摘要:

利用vonNeumann-Cheeger-Gromov $ρ$ -不变量,得到了拓扑四维带边流形中表示二维同调类的局部平坦曲面的最小亏格的新下界.作为一个应用,我们的结果被用来研究切片亏格的纽结。我们举例说明任意大的切片属,我们的下界是最佳的,但所有以前已知的不变量消失。

英文摘要:

We obtain new lower bounds of the minimal genus of a locally flat surface representing a 2-dimensional homology class in a topological 4-manifold with boundary, using the von Neumann-Cheeger-Gromov $ρ$-invariant. As an application our results are employed to investigate the slice genus of knots. We illustrate examples with arbitrarily large slice genus for which our lower bound is optimal but all previously known invariants vanish.

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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