Figure 3
From: Dynamic Networks that Drive the Process of Irreversible Step-Growth Polymerization

The concept of the directed configuration model. (a) (left:) Nodes are signed “half-edges” according to the bivariate degree distribution that provides an input for the model; (right:) these nodes are connected randomly so that the degree distribution is strictly satisfied. (b) An example of a simple degree distribution and the corresponding ensemble of connected components for the case of undirected and directed graphs. Note that in this example there is a qualitative difference between the structure of undirected and directed chains.