Les corps finis dans PARI/GP
Isogénies
? P3 = ellmul(E,G1,d1/3);
? ellorder(E,P3)
%90 = 3
? [eq,iso] = ellisogeny(E,P3);
? eq
%92 = [0,0,0,55*u+49,88*u+26]
? iso
%93 = [x^3+(64*u+23)*x^2+(4*u+65)*x+(72*u+12)
% y*x^3+(96*u+85)*y*x^2+(56*u+4)*y*x+(36*u+40)*
% x+(32*u+62)]
? G1q = ellisogenyapply(iso, G1)
%94 = [28*u+12,84*u+24]
? Eq = ellinit(eq); ellorder(Eq, G1q)
%95 = 562