Fig. 2
From: On the impact of uncertain gene tree rooting on duplication-transfer-loss reconciliation
Maximal clusterings. This figure illustrates the concept of maximal clustering of optimal roots on a gene tree. The unrooted gene trees in (a) have maximally clustered optimal roots such that those roots are as close together on the tree as possible. On the other hand, the gene trees in (b) do not have maximally clustered optimal roots since those roots are not as close together as possible on either of those trees