Torsion-free genus zero congruence subgroups of PSL2(ℝ)
Torsion-free genus zero congruence subgroups of PSL2(ℝ)
复制标题
PSL2(ℝ) 的无扭亏格零同余子群
DOI:
10.1215/s0012-7094-01-11028-4
复制
发表时间:
2001
期刊:
影响因子:
--
通讯作者:
A. Sebbar
中科院分区:
文献类型:
--
作者:
A. Sebbar
We study and classify all the conjugacy classes of the genus zero congruence subgroups of PSL2(R) with no elliptic elements. We show that it suffices to classify those inside the modular group and determine them completely. We also discuss an application to modular curves.