The structure of the normalisers of the congruence subgroups of the Hecke group $G

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/110074We determine the normalisers of congruence subgroups of $G_5$.Group TheoryNumber Theory11F06The structure of the normalisers of the congruence subgroups of the Hecke group $G_5$text