密度模型 $d > \ rac{1}{4}$ 下随机群的性质 (T)
Property (T) for random groups in the density model with $d > \frac{1}{4}$
- Ben-Gurion University of the Negev(内盖夫本古里安大学)
机构由 AI 辅助整理,请以论文原文为准。
AI总结:
本文证明在 Gromov 密度模型中,当密度大于 1/4 时随机群几乎必然具有性质 (T),从而确立了 1/4 为性质 (T) 的阈值。
AI中文摘要:
我们证明,在 Gromov 密度模型(在一定的可除性条件下)中,对于任何密度 $d > \ rac{1}{4}$,随机群渐近几乎必然具有性质 (T)。这确立了 $\ rac{1}{4}$ 作为性质 (T) 的阈值,因为 Ashcroft 已证明当 $d < \ rac{1}{4}$ 时它们不具有性质 (T)。
英文摘要:
We prove that random groups in the Gromov density model (under a certain divisibility condition) have property (T) asymptotically almost surely for any density $d > \frac{1}{4}$. This established $\frac{1}{4}$ as the threshold for property (T), since it was shown by Ashcroft that they do not have property (T) for $d < \frac{1}{4}$.