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The normal subgroup structure of the extended Hecke groups

✍ Scribed by Özden Koruoğlu; Recep Sahin; Sebahattin İkikardes

Publisher
Springer
Year
2007
Tongue
English
Weight
143 KB
Volume
38
Category
Article
ISSN
1678-7714

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Let q be an odd integer >3 and let G q be the Hecke group associated to q. Let ({) be a prime ideal of Z[\* q ] and G(q, {) the principal congruence subgroup of G q associated to {. We give a formula for [G q : G(q, {)], the index of the principal congruence subgroup G(q, {) in G q . We also give fo

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✍ Mong-Lung Lang 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 137 KB

Normalizers of 1 0 (m)+w 2 and 1 0 (m)+w 3 in PSL 2 (R) are determined. The determination of such normalizers enables us to determine the normalizers (in PSL 2 (R)) of the congruence subgroups G 0 4 (A) and G 0 6 (A) of the Hecke groups G 4 and G 6 .