Publication: A constructive method for the cycloidal normal free subgroups of finite index of hecke groups H (√2) AND H (√3)
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Date
2006-09-01
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Acad Sinica
Abstract
Cycloidal subgrups of the modular group are studied in [8]. Here cycloidal free normal subgroups of Hecke groups are considered. It is found that when q equivalent to 2 ( mod 4), H ( lambda(q)) has no such subgroups. In all other cases the signatures of these subgroups are constructed by means of q-gons and their signatures are given.
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Cycloidal subgroups, Hecke groups, Permutation method, Science & technology, Physical sciences, Mathematics
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