Fig. 14

A heatmap visualization (left) and a network representation (right) of the area-of-study interdependence matrix \(R^{{\mathcal {A}}}\) for the LCC \({\mathcal {G}}\) of the Caltech CPN. In the network representation, nodes represent areas of study, each link is directed and starts from the node of the same color. The thickness if a link from a to \(a'\) is proportional to the value of \(R_{aa'}^{{\mathcal {A}}}\). Self-links (from a to a) are not shown. For visual clarity, a large scale visualization of this network is shown in Fig. 20 in the “Appendix”