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arXiv 0905.1469math.GT
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覆盖在标准环面上的编织曲面链接

Braiding surface links which are coverings over the standard torus

Inasa Nakamura

摘要:

我们考虑四维空间中的一个曲面链,它可以由标准环面上的一个简单分支覆盖来表示,我们称之为环面覆盖链。环面覆盖链接包括旋转$T^2$ -结和旋转旋转$T^2$ -结。本文在标准2-球面上编织了一个环面覆盖环。这给出了环面覆盖链环的辫状指数的上估计。特别是,我们表明,转向纺$T^2$-结的环面$(2,\,p)$ -结的编织指数为4。

英文摘要:

We consider a surface link in the 4-space which can be presented by a simple branched covering over the standard torus, which we call a torus-covering link. Torus-covering links include spun $T^2$-knots and turned spun $T^2$-knots. In this paper we braid a torus-covering link over the standard 2-sphere. This gives an upper estimate of the braid index of a torus-covering link. In particular we show that the turned spun $T^2$-knot of the torus $(2,\,p)$-knot has the braid index four.

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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