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https://doi.org/10.1006/jnth.2000.2555
| Title: | Normalizer of Γ1(m) | Authors: | Lang, M.-L. | Keywords: | Congruence subgroups; modular group; normalizer; big picture of Conway | Issue Date: | Jan-2001 | Citation: | Lang, M.-L. (2001-01). Normalizer of Γ1(m). Journal of Number Theory 86 (1) : 50-60. ScholarBank@NUS Repository. https://doi.org/10.1006/jnth.2000.2555 | Abstract: | Let m∈N. Denote by N(Γ1(m)) the normalizer of Γ1(m) in PSL2(R). Then (i) N(Γ1(4))=N(Γ0(4))=Γ0(22)+; (ii) if m≠4, then N(Γ1(m))=Γ0(m)+. © 2001 Academic Press. | Source Title: | Journal of Number Theory | URI: | http://scholarbank.nus.edu.sg/handle/10635/103641 | ISSN: | 0022314X | DOI: | 10.1006/jnth.2000.2555 |
| Appears in Collections: | Staff Publications |
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