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 2k null network. We remove links A–E and C–D, and then add links A–D and C–E: (a) the original toy model, and (b) its corresponding 2k null network.