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Unrooted Binary Tree

The following function
DarwUnrootedTree(t : Tree, title : string)
generates the unrooted binary tree specified by the Tree structure t. Figure [*] contains the unrooted version of the tree from Figure [*]. There trees are also referred to as circular divergence trees.

Figure: An example of a unrooted tree in Darwin. The small circle represents the hypothesized location of the root.

Gaston Gonnet