Figure 2. Seven possible configurations of connected subgraphs with three nodes.
Thin lines and thick lines are the common links and the strong-tie links, respectively.
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.