Adamic/Adar

Adamic/Adar is a score used by Liben-Nowell Kleinberg J. Am.Soc.Inf.Sci.2007

Formal Definition

$\Gamma (x)$ means the neighbor of $x$ and Adamic/Adar score is defined as $\sum _{Z\in \Gamma (x)\cup \Gamma (y)}{\frac {1}{\log {|\Gamma (z)|}}}$