Table 3 Baseline methods for node pair (u, v) with neighbour sets N(u) and N(v). \(\hat {N}\)(x) are the neighbours of the neighbours of x

Adamic-Adar

\(\frac {1}{log(|N(u) \cap N(v)|)}\)

\(\frac {1}{log(|N(u) \cap \hat {N}(v)|)}\)

Common Neighbours

|N(u)∩N(v)|

\(|N(u) \cap \hat {N}(v)|\)

Jaccard Index

\(\frac {|N(u) \cap N(v)|}{|N(u) \cup N(v)|}\)

\(\frac {|N(u) \cap \hat {N}(v)|}{|N(u) \cup \hat {N}(v)|}\)