arXivDaily arXiv每日学术速递 周一至周五更新
arXiv math/0611921math.GT
收藏

结之树隧道

The tree of knot tunnels

Sangbum Cho, Darryl McCullough

摘要:

我们提出了一个新的理论,它描述了收集的所有隧道的隧道数1节的3球(到方向保持等价的意义上的Heegaard分裂)使用盘复杂的属2的bodies和相关的结构。它表明,每个结隧道是从隧道的平凡结通过一个唯一确定的序列简单的电缆建设。一个电缆结构是由一个单一的合理的参数,所以有一个相应的数值参数化的所有隧道序列的这些参数和一些额外的数据。除了定义上的表面差异之外,该序列的最终参数是隧道的沙尔曼-汤普森不变量,其他参数是施工产生的中间隧道的沙尔曼-汤普森不变量。我们计算了二桥结隧道的参数序列。该理论很容易扩展到链接,并允许等价的隧道同胚,可能是方向反转。

英文摘要:

We present a new theory which describes the collection of all tunnels of tunnel number 1 knots in the 3-sphere (up to orientation-preserving equivalence in the sense of Heegaard splittings) using the disk complex of the genus-2 handlebody and associated structures. It shows that each knot tunnel is obtained from the tunnel of the trivial knot by a uniquely determined sequence of simple cabling constructions. A cabling construction is determined by a single rational parameter, so there is a corresponding numerical parameterization of all tunnels by sequences of such parameters and some additional data. Up to superficial differences in definition, the final parameter of this sequence is the Scharlemann-Thompson invariant of the tunnel, and the other parameters are the Scharlemann-Thompson invariants of the intermediate tunnels produced by the constructions. We calculate the parameter sequences for tunnels of 2-bridge knots. The theory extends easily to links, and to allow equivalence of tunnels by homeomorphisms that may be orientation-reversing.

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。

↑