English
If P_y Q_z^3 = W.negY Q P_z^3 and hy', then W.addMap ⟦P⟧ ⟦Q⟧ equals the vector ⟦![1,1,0]⟧ after mapping through the Y-equality case.
Русский
Если P_y Q_z^3 = W.negY Q P_z^3 и hy', то W.addMap ⟦P⟧ ⟦Q⟧ превращается в вектор ⟦[1,1,0]⟧ после применения правила Y-равенства.
LaTeX
$$W'.addMap ⟦P⟧ ⟦Q⟧ = ⟦![1, 1, 0]⟧$$
Lean4
/-- The addition of two nonsingular Jacobian points on a Weierstrass curve `W`.
Given two nonsingular Jacobian points `P` and `Q` on `W`, use `P + Q` instead of `add P Q`. -/
noncomputable def add (P Q : W.Point) : W.Point :=
⟨nonsingularLift_addMap P.nonsingular Q.nonsingular⟩