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Congruence subgroups of Hecke groups

✍ Scribed by Bo Chen; Ping Zhi Yuan

Publisher
Institute of Mathematics, Chinese Academy of Sciences and Chinese Mathematical Society
Year
2009
Tongue
English
Weight
292 KB
Volume
25
Category
Article
ISSN
1439-7617

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πŸ“œ SIMILAR VOLUMES

Principal Congruence Subgroups of the He
Principal Congruence Subgroups of the Hecke Groups
✍ Mong-Lung Lang; Chong-Hai Lim; Ser-Peow Tan πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 126 KB

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

Normalizers of the Congruence Subgroups
Normalizers of the Congruence Subgroups of the Hecke Groups G4 and G6
✍ Mong-Lung Lang πŸ“‚ Article πŸ“… 2001 πŸ› Elsevier Science 🌐 English βš– 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 .