Figure 17From: Enumerating all maximal frequent subtrees in collections of phylogenetic treesSupportive illustrations for the proof of Lemma 1, parts 2 and 3. T x y is a result of type-2 join in all the cases. (a) T y z is a result of type-2 join. There are four possibilities for a topology that can display both T x y and T y z : (b)—(e). (f) T y z is a result of type-1 join. (g) T y z is a result of type-3 join. (h) T y z is a result of type-4 join.Back to article page