2006 / September Volume 1 No.3
A constructive method for the cycloidal normal free subgroups of finite index of Hecke groups $H(\sqrt{2})$ and $H(\sqrt{3})$
Published Date |
2006 / September
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Title | A constructive method for the cycloidal normal free subgroups of finite index of Hecke groups $H(\sqrt{2})$ and $H(\sqrt{3})$ |
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Pagination | 429-436 |
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 $q \equiv 2$ (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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AMS Subject Classification |
20H05, 11F06, 11F41, 11F46
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Received |
2005-11-10
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