On the Subgroups of the Triangle Group *2p∞

In this work, we discuss the low index subgroups of the triangle group *2p∞ (also called the extended Hecke group) which were derived using tools in color symmetry theory. Moreover, we present the low index subgroups of the index 2 subgroups of the extended modular group *23∞.

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Bibliographic Details
Main Authors: Miro, Eden Delight, De Las Peñas, Ma. Louise Antonette N, Decena, M C B
Format: text
Published: Archīum Ateneo 2012
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Online Access:https://archium.ateneo.edu/mathematics-faculty-pubs/100
https://www.worldscientific.com/doi/abs/10.1142/9789814366311_0038
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Institution: Ateneo De Manila University
Description
Summary:In this work, we discuss the low index subgroups of the triangle group *2p∞ (also called the extended Hecke group) which were derived using tools in color symmetry theory. Moreover, we present the low index subgroups of the index 2 subgroups of the extended modular group *23∞.