Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The Max Orthology problem. An instance of the max orthology problem, with X being the highest preservable descendants of the root of G in figure 2. (1) The starting tree F0, which is a copy of S. (2) The Fk tree, which depicts the tree obtained after grafting every node of X. (3) The final tree F, obtained by removing the leaves initially in F0 and standardizing.
