Mumtaz, Nighat
(Quaid-i-Azam University, Islamabad., 2019)
The modular group generated by two linear fractional transformations, u : z 7!
1 z
and v : z 7!
z1 z
, satisfying the relations u2 = v3 = 1 [46]. The linear transformation
t : z 7!
1 z
inverts u and v, i,e, t2 = ...