Since the beginning of the last century, research on complex systems has advanced the fields of chaos, fractals and networks. A network consists of nodes and edges, where nodes represent the elements of a complex system and edges describe the interactions among them. Such node-edge relations can be represented by an adjacency matrix, whose order equals the number of nodes and each row-sum corresponds to a node degree. The heterogeneity of node degrees leads to the emergence of star-shaped structures centered at hub nodes.
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