clear;
Fq:=GF(11);
Poly<x>:=PolynomialRing(Fq);
f:=x^3-2*x;
y:=x; 
Roots(y^2-f);
E:=EllipticCurve(f);
P:=E![5,7]; Q:=E![8,10];
y:=x+2;
Roots(y^2-f); 
P+Q;
