Zhaohu Nie

Connected fundamental domains for congruence subgroups

Abstract We give explicit sets of right coset representatives for the congruence subgroups Γ 0 ( N ) $\Gamma _0(N)$ normal upper Gamma 0 left parenthesis upper N right parenthesis , Γ 1 ( N ) , $\Gamma _1(N),$ normal upper Gamma 1 left parenthesis upper N right parenthesis comma...