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Normalizers of the congruence subgroups of the Hecke group G(5)
Authors
Lang, ML
Tan, SP
Citation
Ml. Lang et Sp. Tan, Normalizers of the congruence subgroups of the Hecke group G(5), P AM MATH S, 127(11), 1999, pp. 3131-3140
Citations number
11
Categorie Soggetti
Mathematics
Journal title
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY
ISSN journal
00029939 →
ACNP
Volume
127
Issue
11
Year of publication
1999
Pages
3131 - 3140
Database
ISI
SICI code
0002-9939(199911)127:11<3131:NOTCSO>2.0.ZU;2-H
Abstract
Let lambda = 2cos(pi/5) and let G be the Hecke group associated to lambda. In this article, we show that for tau a prime ideal in Z [lambda], the cong ruence subgroups G(o)(tau) of G are self-normalized in PSL2( R).