Figure 2. Sampling of Tree Topologies.
The topology of the tree on the left gets modified into the tree on the right by swapping an aunt (A) and its niece (B). Nice–aunt swapping has been shown to be ergodic.
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.