|
Chords of longest cycles
|
opg |
partial |
★★★ |
2007-11-12 |
|
Hamiltonian cycles in line graphs
|
opg |
partial |
★★★ |
2007-07-24 |
|
Arc-disjoint out-branching and in-branching
|
opg |
partial |
★★ |
2013-03-02 |
|
Edge-disjoint Hamilton cycles in highly strongly connected tournaments.
|
opg |
solved |
★★ |
2013-03-08 |
|
Partitionning a tournament into k-strongly connected subtournaments.
|
opg |
solved |
★★ |
2013-03-15 |
|
Subgraph of large average degree and large girth.
|
opg |
partial |
★★ |
2013-03-05 |
|
Counting 3-colorings of the hex lattice
|
opg |
open |
★★ |
2008-07-05 |
|
The Bermond-Thomassen Conjecture
|
opg |
partial |
★★ |
2007-10-01 |