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Inferring Phylogenetic Networks with Maximum Pseudolikelihood under Incomplete Lineage Sorting

Fig 3

Example of a 4-taxon semi-directed network (left), with known direction of both hybrid edges but unspecified position of the root.

The root can be placed on the internal edges with length t2, t3, t4, or on the external edges to C or D. The quartet CFs on this network are weighted averages of CFs under 4 trees with weights as shown (right).

Fig 3