MMN-780
Squares of congruence subgroups of the extended modular group
Abstract
n this paper, we generalize some results related to the congruence subgroups of mo-
dular group ; given in [7] and [6] by Kiming, Sch ̈ tt, and Verrill, to the extended modular group
u.
Vol. 14 (2013), No. 3, pp. 1031-1035