Hello

I hope someone can help me with this.

Let's imagine I want to perform the following subtraction operation -

(7, 1) - (2, 3)

Both are geometric points on an elliptic curve.

As far as I know, finite field subtraction is simply finite field addition using the additive inverse of the bit I want to subtract, i.e. (7, 1) + [additiveInverse(2, 3)]

Is this correct?

Does anyone know how I can calculate the additive inverse of a point?

Is it simply (-2, -3)?

Any help greatly appreciated.

Thanks!