| The Domatic Number of Regular Graphs Recent countries visiting this post |  |
 | 7 | United States |
 | 4 | India |
 | 3 | Iran, Islamic Republic of |
 | 1 | |
 | 1 | Japan |
 | 1 | Russian Federation |
 | 1 | Brazil |
| The Domatic Number of Regular Graphs Recent countries visiting this post | |
| 7 | United States |
| 4 | India |
| 3 | Iran, Islamic Republic of |
| 1 | |
| 1 | Japan |
| 1 | Russian Federation |
| 1 | Brazil |