hi，its about ScalarMult(x1, y1 *big.Int, k []byte) (x, y *big.Int) ；
for example ：
I have one point on the ellipse. ( x , y ).

x1 , y1 := ScalarMult( x , y , g)

gm = big.NewInt(0).ModInverse(g, elliptic.Params().P) //gm = [g 1 Mod P]x2,y2 := ScalarMult(x1 , y1 , gm)
because g * gm mod p = 1; so (x2, y2) should equal to (x , y) , but its not.
could anyone help me ?