Solving for the dynamics of he universe, Valerio Faraoni., Am. J. Phys. 67(8), August 1999
A new method of solving the Einstein-Friedmann dynamical equations of a spatially homogenous ad isotropic universe is presented. The method is applicable when the equation of state of the material content assumes the form P = (g - 1)r<, g = constant; The solution for the expansion factor is commonly given only for - 0, 1, and 4/3 when the curvature index is K = -+1. The proposed procedure is valid for general g and K and it allows for ease of derivation of the solutions. This alternative method is useful pedagogically to introduce basic cosmology.