# About How to Elliptic Curve Equation and Discriminant

I am study public key cryptology and interested in elliptic curve cryplogical algorithms. I have some problem about elliptic curve equation. First I can't find inter process and transformation steps from general curve equation to elliptic curve equation weierstrass form, Second , why a1 and a3 scaler is left side, a2,a4,a6 scaler is right side of y^2+a1xy+a3y=x^3+a2x^2+a4x+a6 equation .