Some subgroups of the extended Hecke groups H(-)over-bar(λq)

被引：0
|
作者：
Sahin, R [1 ]
Bizim, O
机构：
[1] Balikesir Univ, Fac Arts & Sci, Dept Math, TR-10100 Balikesir, Turkey
[2] Uludag Univ, Fac Ats & Sci, Dept Math, TR-16059 Bursa, Turkey
来源：
ACTA MATHEMATICA SCIENTIA | 2003年 / 23卷 / 04期
关键词：
extended Hecke group; even subgroup; commutator subgroup; principal congruence subgroup;
D O I：
暂无
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
The authors consider the extended Hecke groups (H) over bar(lambda(q)) generated by T(z) = -1/z, S(z) = -1/(z + lambda(q)) and R(z) = 1/(z) over bar with lambda(q) = 2 cos(pi/q) for q greater than or equal to 3 an integer. In this paper, the even subgroup (H) over bar (e)(lambda(q)), the second commutator subgroup (H) over bar "(lambda(q)) and the principal congruence subgroups (H) over bar (p)(lambda(q)) of the extended Hecke groups (H) over bar "(lambda(q)) are studied. Also, relations between them are given.
引用
收藏
页码：497 / 502
页数：6
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