Normalizers of intermediate congruence subgroups of the Hecke subgroups

Open Mathematics

Im Bo-Hae¹  Jeon Daeyeol²  Kim Chang Heon³ 

[1] Department of Mathematical Sciences, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon,34141, South Korea;Department of Mathematics education, Kongju National University, 56 Gongjudaehak-ro, Gongju-si, Chungcheongnam-do 314-701, South Korea;Department of Mathematics, Sungkyunkwan University, Suwon440-746, South Korea;

关键词: normalizers;    hecke subgroups;    modular curves;    automorphism groups;    20h05;    19b37;    11g18;   

DOI  :  10.1515/math-2017-0066

来源: DOAJ

【 摘 要 】

For a square-free positive integer N, we study the normalizer of ΓΔ(N) in PSL2(ℝ) and investigate the group structure of its quotient by ΓΔ(N) under certain conditions.

【 授权许可】

Unknown