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.
Example network motifs (circles: observed and hidden components; triangle: unobserved or indirectly observed component)
a Motif without hidden components, that is, all components are observed
b Motif with a single hidden component (h), where all other components are observed
c Motif with a single hidden component (h) and partially observed components
Partially observed networks are discussed in Section 3.5
