Figure 16From: Enumerating all maximal frequent subtrees in collections of phylogenetic treesSupportive illustrations for the proof of Lemma 1, part 1. T x y is a result of type-1 join in all the cases. (a) T y z is a result of type-1 join. (b) T y z is a result of type-2 join. (c) T y z is a result of type-3 join. (d) T y z is a result of type-4 join.Back to article page