 Due to symmetry of the function with respect to the variables "x"+ and "x"−, "P"(δ) = "P"(1 − δ), i.e., the function "P"(δ) is symmetrical with respect to the point δ = 1/2.Then

formula_104

On evaluating this integral (for 0 ≤ δ ≤ 1/2 and then making use of the aforementioned symmetry), finally
The mean value formula_105= 1/2 already as a result of the symmetry of the function "P"(δ).Thus the mean value of the initial (in every era) amplitude of oscillations of the functions α, β, γ increases as Ω/2.