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Figure 2 | EPJ Data Science

Figure 2

From: The classical origin of modern mathematics

Figure 2

Country prevalence dendrogram. Clustering of the countries according to their time prevalence profile \(\tilde{f}_{I}(t)\). The lines in the plots on the right describe the average prevalence profile for the cluster \(\langle\tilde{f}_{C}(t)\rangle =\sum_{I\in C}\tilde{f}_{I}(t)/(\sum_{I\in C} 1)\). The shadowed area is included between the minimum value and the maximum value of the prevalence profile on the cluster \((\min_{I\in C}\tilde{f}_{I}(t),\max_{I\in C}\tilde{f}_{I}(t))\).

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