Pressureless matter
= Pressureless matter
{wiki}
Pressureless matter has equation-of-state parameter $w=0$, energy density $\rho\propto a^{-3}$ and negligible stress compared with its rest-mass density.
= Pressureless matter
{wiki}
Pressureless matter has equation-of-state parameter $w=0$, energy density $\rho\propto a^{-3}$ and negligible stress compared with its rest-mass density.