e=initell([0,0,-1,-1,0]) pp=[0,0] w = ( (unit(65)-7)/2) pm=[-7/9, (11+5*w)/27 ] isoncurve(e,pm) isoncurve(e,pp) p=257 mt(a,b,p1,x,u,v,t)=\ b=258-a;\ p1=addell(e,pm,powell(e,-a,pp));\ x=p1[1];\ a=real(x);\ b=imag(x);\ u=denom(a);\ v=denom(b);\ dn=lcm(u,v);\ nm=dn*x; \ t= gcd(norm(nm),dn))