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 networks used in three simulated examples. The black lines represent the common structure, whereas the red, blue and green lines represent the individual links in the three categories. ρ is the ratio of the number of individual links to the number of common links.
