%0 Journal Article
%T On the Subgroups of the Extended Hecke, Hecke and Picard Groups
%A Ma. Louise Antonette N. De Las Penas
%A Ma. Carlota B. Decena
%A Glenn R. Laigo
%J Mathematics
%D 2009
%I arXiv
%X In this work, we derive the low index subgroups of the extended Hecke, Hecke and the Picard groups using tools in color symmetry theory. We also present the low index subgroups of the modular group.
%U http://arxiv.org/abs/0906.3412v1