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.
Coherent and incoherent length-4 cycles
| Type of length-4 cycle | n. |
|---|---|
| coherent, (+, + / +, +) | 25158 |
| coherent, (+, + / −, −) | 3042 |
| coherent, (−, − / −, −) | 28166 |
| mixed, (+, + / +, −) | 1138 |
| mixed, (+, − / −, −) | 2658 |
| incoherent, (+, − / +, −) | 9375 |
Signs are as in Fig. 3
