Normalizers of intermediate congruence subgroups of the Hecke subgroups

Im Bo-Hae; Jeon Daeyeol; Kim Chang Heon

doi:10.1515/math-2017-0066

Open Mathematics (Jun 2017)

Normalizers of intermediate congruence subgroups of the Hecke subgroups

Im Bo-Hae,
Jeon Daeyeol,
Kim Chang Heon

Affiliations

Im Bo-Hae: Department of Mathematical Sciences, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
Jeon Daeyeol: Department of Mathematics education, Kongju National University, 56 Gongjudaehak-ro, Gongju-si, Chungcheongnam-do 314-701, South Korea
Kim Chang Heon: Department of Mathematics, Sungkyunkwan University, Suwon440-746, South Korea

DOI: https://doi.org/10.1515/math-2017-0066
Journal volume & issue: Vol. 15, no. 1
pp. 787 – 799

Abstract

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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.

Published in Open Mathematics

ISSN: 2391-5455 (Online)
Publisher: De Gruyter
Country of publisher: Poland
LCC subjects: Science: Mathematics
Website: https://www.degruyter.com/journal/key/math/html

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