The results with fractions or float (floating point number) are represented on the curve with integers.
Totally agree with you and not only that.
- All negative numbers (Result of some subtractions) are still represented by positive values.
- All numbers can be fractions or integers. x/(N-1) where N is the Order of the curve
- Negative odd values are posive even values.
And the other way around is also valid, The lats point is also some important because we can't know if a subtraction result is negative or posive, odd or even.
IMO After 3 years of learning all that I can, I reached the conclusion that there is not an Arithmetic operation with the public key that can lead in any bit disclosure.