arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.09088math.GT
收藏

曲面上交替纽结的尖点体积

Cusp Volumes of Alternating Knots on Surfaces

Brandon Bavier

摘要:

我们研究了闭三维流形中允许在嵌入曲面上交替投影的双曲纽结的几何。我们证明了,在温和的假设下,其尖点面积承认双边界的交替投影的扭曲数和投影曲面的亏格。其结果是,我们得出的斜坡长度的图解估计和Dehn手术的应用。这些结果推广了Lackenby和Purcell关于3-球面上交错纽结的结果.利用Kalfagianni和Purcell的结果,我们指出,交替结的表面上的更高的属,可以有任意小的尖点密度,相反,交替结的球的尖点密度有界远离零由于Lackenby和Purcell。

英文摘要:

We study the geometry of hyperbolic knots that admit alternating projections on embedded surfaces in closed 3-manifolds. We show that, under mild hypothesis, their cusp area admits two sided bounds in terms of the twist number of the alternating projection and the genus of the projection surface. As a result, we derive diagrammatic estimates of slope lengths and give applications to Dehn surgery. These generalize results of Lackenby and Purcell about alternating knots in the 3-sphere. Using a result of Kalfagianni and Purcell, we point out that alternating knots on surfaces of higher genus, can have arbitrarily small cusp density, in contrast to alternating knots on spheres whose cusp densities are bounded away from zero due to Lackenby and Purcell.

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。

↑