## What is overdensity in the cosmology ??

Alisson Pereira Costa
Posts: 1
Joined: December 21 2013

### What is overdensity in the cosmology ??

What is overdensity in the cosmology ??

Thanks

Himanish Ganjoo
Posts: 2
Joined: February 26 2016
Affiliation: BITS Pilani

### What is overdensity in the cosmology ??

Typically in cosmology, overdensity refers to the deviation of the density at a point from the average density:

$\delta(x) = \frac{\rho(x) - \bar{\rho}}{\bar{\rho}}$