Figure 3.

This tree-child network has X = {1, 2, 3, 4}. There are 7 arcs not leading to a hybrid vertex but only 6 distances, and the weights are not uniquely determined. The network is not normal because arc (5, 10) is redundant.

Willson Algorithms for Molecular Biology 2012 7:13   doi:10.1186/1748-7188-7-13
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