马古利斯数与数域
微分几何
2011-08-12 v2 几何拓扑
数论
摘要
我们证明,在等距意义下,所有具有给定迹域的闭可定向双曲3-流形中,除有限多个外,其余均以0.34作为马古利斯数。这一结论是从一个更技术性的结果推导出来的,该结果给出了一个条件,在此条件下,对于每个,有,其中和属于某个数域的,生成的一个离散无挠群,且不交换。具体而言,如果存在的一个赋值,使得(1) 的剩余域的特征数足够大,(2) ,且(3) 在自然同态下的像的阶为7,则此条件总是成立。
引用
@article{arxiv.0902.1011,
title = {Margulis numbers and number fields},
author = {Peter B. Shalen},
journal= {arXiv preprint arXiv:0902.1011},
year = {2011}
}
备注
This is a completely new paper. Many of the results of my previously posted paper of the same title were subsumed by my paper "A generic Margulis number for hyperbolic 3-manifolds." In the new paper I get a considerably stronger generic Margulis number for the class of manifolds with a prescribed trace field than for the class of all (closed, orientable hyperbolic 3-)manifolds. (54 pages)