Homomorphisms
| Title | Source | Status | Imp. | Posted |
|---|---|---|---|---|
| Mapping planar graphs to odd cycles | opg | partial | ★★★ | 2007-06-24 |
| Pentagon problem | opg | open | ★★★ | 2007-03-24 |
| Algorithm for graph homomorphisms | opg | partial | ★★ | 2010-07-08 |
| Cores of Cayley graphs | opg | partial | ★★ | 2007-03-06 |
| Weak pentagon problem | opg | partial | ★★ | 2007-07-13 |
| Circular choosability of planar graphs | opg | open | ★ | 2012-08-23 |