Figure 1.
Search space tree. The leaves of the search space tree corresponding to a path of the search tree leading to an isomorphism are highlighted with a green stick.
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.