Changes

:Substituting <math>E_d(r)=E_o-E(r)</math> where <math>E(r)</math> is energy of photons at distance <math>r</math> from their source and <math>1/R_E^2=4\pi G\rho/c^2</math>, number called in cosmology "curvature of space of Einstein's universe" (or <math>R_E=</math>"Einstein's radius of universe"), we get  

:Substituting <math>E_d(r)=E_o-E(r)</math> where <math>E(r)</math> is energy of photons at distance <math>r</math> from their source and <math>1/R_E^2=4\pi G\rho/c^2</math>, number called in cosmology "curvature of space of Einstein's universe" (or <math>R_E=</math>"Einstein's radius of universe"), we get  

:<math>d^2E(r)/dr^2=E(r)/R_E^2</math>

::<math>d^2E(r)/dr^2=E(r)/R_E^2</math>

==== Step 6: Solving the above equation ====

==== Step 6: Solving the above equation ====