环面三维流形具有可循环排序的基本群
Toroidal 3-manifolds have circularly orderable fundamental groups
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中文总结 AI 辅助
研究环面三维流形基本群的可循环排序问题,通过证明其存在有限循环覆盖且基本群可左排序来实现,还验证了相关猜想,揭示了环面三维流形与L-空间猜想等的关系。
中文摘要 AI 辅助
在本文中,我们通过证明环面三维流形允许具有可左排序基本群的有限循环覆盖,从而证明其具有可循环排序的基本群。这些覆盖也不是L-空间,并且如L-空间猜想所预测的那样,通常允许共定向的紧叶状结构。因此,我们验证了Ba和Clay的一个猜想,该猜想刻画了具有可循环排序基本群的图流形。
英文摘要
In this article we prove that toroidal 3-manifolds have circularly-orderable fundamental groups by showing that they admit finite cyclic covers with left-orderable fundamental groups. These covers are also not L-spaces and often admit co-orientable taut foliations, as predicted by the L-space conjecture. As a consequence, we verify a conjecture of Ba and Clay, which characterises graph manifolds with circularly-orderable fundamental groups.