Turkish Journal
of
Mathematics
math@tubitak.gov.tr
Turkish Journal of Mathematics
On the Normalizer of the Congruence Subgroup H05(I) of the Hecke Group H5Department of Mathematics,
Faculty of Science and Arts,
Karadeniz Technical University,
61080 Trabzon-TURKEY
e-mail: suzunktu@yahoo.com
Abstract: Let l = 2 cos \frac{p}{5} and let H5 be the Hecke group associated to l. In this paper, the normalizers of the congruence subgroups H05(I) in PSL(2Z[l]) are studied in the case where I = (2)aI ', (2, I') = 1 and I' is a prime ideal.
Key Words: Normalizer, Congruence subgroup, Hecke group
Turk. J. Math., 31, (2007), 207-220.
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Other articles published in the same issue: Turk. J. Math.,vol.31,iss.2.