surface
| Title | Source | Status | Imp. | Posted |
|---|---|---|---|---|
| Consecutive non-orientable embedding obstructions | opg | open | ★★★ | 2007-03-27 |
| Grunbaum's Conjecture | opg | disproved | ★★★ | 2007-04-04 |
| 5-local-tensions | opg | open | ★★ | 2007-06-22 |
| Drawing disconnected graphs on surfaces | opg | partial | ★★ | 2007-05-12 |