login
Gamma_0(n) has genus 0 and does not contain any elliptic elements.
0

%I #3 Mar 30 2012 16:49:06

%S 4,6,8,9,12,16,18

%N Gamma_0(n) has genus 0 and does not contain any elliptic elements.

%D J. McKay and A. Sebbar, Fuchsian groups, automorphic functions and Schwarzians, Math. Ann., 318 (2000), 255-275.

%K nonn,fini,full

%O 1,1

%A _N. J. A. Sloane_, Jun 27 2001