Nodes of the Zachary Karate Club network, where the colors represent the value of the Heaps’s exponents for each node.

From the article:

Interacting Discovery Processes on Complex Networks
Iacopo Iacopini, Gabriele Di Bona, Enrico Ubaldi, Vittorio Loreto, and Vito Latora
Phys. Rev. Lett. 125, 248301 (2020)

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