CONFIG
tracktype: 1;
sharpendigits: 24;
imagthreshold: 1e-4;
END;
INPUT
variable_group x,y,z,u,v;
function f1,f2,crit;
r_squared=x^2+y^2+z^2;
f1=r_squared-1-u^2;
f2=r_squared-4+v^2;
crit=-4*u*v;
END;

