Table 1.
Definition of triad types
| Minimal legs weight | Closure | |
|---|---|---|
| Open triad | w (2) = 1 | w (1) = 0 |
| Closed triad | w (2) > 0 | w (1) > 0 |
| Forbidden triad | w (2) > 1 | w (1) = 0 |
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.