### What is overdensity in the cosmology ??

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**December 22 2013**What is overdensity in the cosmology ??

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Posted: **December 22 2013**

What is overdensity in the cosmology ??

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Posted: **February 28 2016**

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

[tex]\delta(x) = \frac{\rho(x) - \bar{\rho}}{\bar{\rho}}[/tex]

[tex]\delta(x) = \frac{\rho(x) - \bar{\rho}}{\bar{\rho}}[/tex]