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 illustration of a 2-ECRNJ, where the black nodes denote supernodes, white nodes denote leaves or internal nodes, solid and dashed lines represent branches, dashed lines denotes branch to be deleted and the nodes in dashed cycles denote the ones to be refined.
