Turkish Journal of Mathematics
DOI
-
Abstract
In this work we study the suucture of some special normal subgroups of Hecke groups. Particwarly those of genus O and 1 are studied by means of the regwar map theory which has been a growing subject in recent years. As a nice application, we calcwate the total number of genus 1 normal subgroups for a given index.
Keywords
IIecke groups, Ievel, parabolic class number
First Page
143
Last Page
151
Recommended Citation
CANGÜL, İsmail Naci (1997) "About Some Normal Subgroups of Hecke Groups," Turkish Journal of Mathematics: Vol. 21: No. 2, Article 2. Available at: https://journals.tubitak.gov.tr/math/vol21/iss2/2
