For the secp256k1 curve, by coordinate values (((x_1)^4−56(x_1))/(4(x_1)^3+28))=(x_2) from this we get
((y_1)^4+126*(y_1)^2-1323)/(8(y_1)^3)=y_2 from this we get
For the secp256k1 curve, by coordinate values (((x_1)^4−56(x_1))/(4(x_1)^3+28))=(x_2) from this we get
((y_1)^4+126*(y_1)^2-1323)/(8(y_1)^3)=y_2 from this we get