It is my be⁻lie⁻f that (H − E) can only diffe⁻r from the⁻ kine⁻tic e⁻ne⁻rgy K by an additive⁻ constant.
The⁻re⁻fore⁻, https://file⁻.garde⁻n/X5nOw-a95myVyjmt/K0-K1
Or for those⁻ who this may not come⁻ across to, K₀-K₁ = E * ([1-v²/c²]⁻¹/² - 1).