| Vertex Partitions by Connected Monochromatic k-Regular Graphs Recent countries visiting this post |  |
 | 1 | United States |
 | 1 | China |
 | 1 | |
 | 1 | Russian Federation |
| Vertex Partitions by Connected Monochromatic k-Regular Graphs Recent countries visiting this post | |
| 1 | United States |
| 1 | China |
| 1 | |
| 1 | Russian Federation |