private Point MultipySamePoints()
{
BigInteger x1 = pointP.x;
BigInteger y1 = pointP.y;
BigInteger x2 = pointQ.x;
BigInteger y2 = pointQ.y;
BigInteger lambda = ((3 * BigInteger.ModPow(x1, 2, modulo) + a) * BigIntigerMath.InverseNumberMod(2 * y1, modulo)) % modulo;
BigInteger x3 = (BigInteger.ModPow(lambda, 2, modulo) - 2 * x1) % modulo;
BigInteger y3 = (lambda * (x1 - x3) - y1) % modulo;
return(new Point(x3, y3));
}
private Point AddDifferentPointsPAndQ()
{
BigInteger x1 = pointP.x;
BigInteger y1 = pointP.y;
BigInteger x2 = pointQ.x;
BigInteger y2 = pointQ.y;
BigInteger lambda = ((y2 - y1) * BigIntigerMath.InverseNumberMod(x2 - x1, modulo)) % modulo;
BigInteger x3 = (BigInteger.ModPow(lambda, 2, modulo) - x1 - x2) % modulo;
BigInteger y3 = (lambda * (x1 - x3) - y1) % modulo;
return(new Point(x3, y3));
}
