## Cosmological Principle Explanation with the Special Relativity

Using special relativity, I succeeded in mathematically proving the cosmological principles regarding the uniformity and isotropy of the universe. The particle density distribution, centered on itself in all primordial inertial systems in this universe, was calculated as $$\frac{1}{8} \left( \frac{r}{1 - r} \right)^2$$ in polar coordinates. ---- Originally in English