Uncovering offline event similarity of online friends by constructing null models
Cui Wenkuo1, Xiao Jing1, Li Ting1, Xu Xiaoke1, 2, †
       

The construction process of the 3k null network. We remove links A–B and C–D, and then add links A–D and B–C: (a) the original toy model, and (b) its corresponding 3k null network.