Some subgroups of the extended Hecke groups H(-)over-bar(lambda(q))

Sahin R., Bizim O.

ACTA MATHEMATICA SCIENTIA, cilt.23, sa.4, ss.497-502, 2003 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 23 Sayı: 4
  • Basım Tarihi: 2003
  • Dergi Adı: ACTA MATHEMATICA SCIENTIA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.497-502
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

The authors consider the extended Hecke groups (H) over bar(lambda(q)) generated by T(z) = -1/z, S(z) = -1/(z + lambda(q)) and R(z) = 1/(z) over bar with lambda(q) = 2 cos(pi/q) for q greater than or equal to 3 an integer. In this paper, the even subgroup (H) over bar (e)(lambda(q)), the second commutator subgroup (H) over bar "(lambda(q)) and the principal congruence subgroups (H) over bar (p)(lambda(q)) of the extended Hecke groups (H) over bar "(lambda(q)) are studied. Also, relations between them are given.