 Even at "k" 's as small as several units "x" can be ignored in comparison to "k" so that the increase of α and β oscillation amplitudes becomes proportional to the era length.For functions "a" = "e"α and "b" = "e"β this means that if the amplitude of their oscillations in the beginning of an era was "A"0, at the end of this era the amplitude will become formula_70.The length of Kasner epochs (in logarithmic time) also increases inside a given era; it is easy to calculate from that Δ"n"+1 > Δ"n".