 Its time duration corresponds to change of "t" from "t"0 to the value "t"1, related to ξ0 according to
The relationship between ξ and "t" during this time can be presented in the form

After that, as seen from , the decreasing function "c" starts to increase while functions "a" and "b" start to decrease.This Kasner epoch continues until terms "c"2/"a"2"b"2 in become ~ "t"2 and a next series of oscillations begins.The law for density change during the long era under discussion is obtained by substitution of in