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| Type | Title | Author | Replies | Last Post |
|---|---|---|---|---|
| category | Erickson, Martin | Anonymous | 0 | 14 years 47 weeks ago |
| Open problem | Sequence defined on multisets | Martin Erickson | 1 | 14 years 47 weeks ago |
| Open problem | Vertex Coloring of graph fractional powers | Iradmusa | 1 | 14 years 47 weeks ago |
| category | Araújo, Cohen, Giroire, Havet | Anonymous | 0 | 14 years 48 weeks ago |
| Open problem | Hirsch Conjecture | Robert Samal | 4 | 14 years 48 weeks ago |
| Open problem | Covering powers of cycles with equivalence subgraphs | Andrew King | 0 | 14 years 48 weeks ago |
| Open problem | Complexity of square-root sum | abie | 5 | 14 years 49 weeks ago |
| category | good edge labeling, edge labeling | Anonymous | 0 | 14 years 49 weeks ago |
| Open problem | Snevily's conjecture | mdevos | 1 | 15 years 2 weeks ago |
| Open problem | spanning trees | akhodkar | 3 | 15 years 3 weeks ago |
| forum topic | A list of open problems in Algebraic Topology | porton | 0 | 15 years 3 weeks ago |
| category | complete multipartite graph | Anonymous | 0 | 15 years 3 weeks ago |
| category | Ohba, Kyoji | Anonymous | 0 | 15 years 3 weeks ago |
| Open problem | Ohba's Conjecture | Jon Noel | 0 | 15 years 3 weeks ago |
| category | chromatic number, fractional power of graph, clique number | Anonymous | 0 | 15 years 7 weeks ago |
| category | fractional coloring | Anonymous | 0 | 15 years 7 weeks ago |
| category | Heckman, Christopher C. | Anonymous | 0 | 15 years 7 weeks ago |
| Open problem | 3-flow conjecture | mdevos | 1 | 15 years 8 weeks ago |
| Open problem | Invariant subspace problem | tchow | 2 | 15 years 9 weeks ago |
| Open problem | Sets with distinct subset sums | mdevos | 1 | 15 years 9 weeks ago |
| category | Rabern, L. | Anonymous | 0 | 15 years 10 weeks ago |
| category | maximal clique | Anonymous | 0 | 15 years 10 weeks ago |
| category | King, Andrew D. | Anonymous | 0 | 15 years 10 weeks ago |
| Open problem | Hitting every large maximal clique with a stable set | Andrew King | 0 | 15 years 10 weeks ago |
| Open problem | Seymour's Second Neighbourhood Conjecture | nkorppi | 5 | 15 years 12 weeks ago |
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