Figure 4
From: Temporal link prediction via adjusted sigmoid function and 2-simplex structure

Schematic diagram of the topology around the target link. In this figure, the node pair x and y is to be predicted, \(\{z_1, z_2, z_3\}\) are their common neighbors, and they form 2-simplices \(\{x, z_i, y\}, i=1,2,3\). h is the hidden neighbor of endpoint x, and \((x\sim h)\) is the latent edge. The simplicial complex J can be decomposed into two 2-simplices \(\{x, k_1, h\}\) and \(\{x, h, y\}\). Symmetrically, \(k_1\) and \(k_2\) are hidden neighbors of node y.