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Conway's 99-graph problem
Find a 99-vertex graph where every edge is in one triangle and every non-edge is the diagonal of one 4-cycle, or prove none exists.
+25 −0 scienceslack.json 新增 查看文件
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| 1 | +{ | |
| 2 | + "domain": "mathematics", | |
| 3 | + "topics": [ | |
| 4 | + "graph-theory", | |
| 5 | + "combinatorics" | |
| 6 | + ], | |
| 7 | + "type": "construction", | |
| 8 | + "also": [ | |
| 9 | + "proof" | |
| 10 | + ], | |
| 11 | + "cover": { | |
| 12 | + "motif": "graph", | |
| 13 | + "n": 8 | |
| 14 | + }, | |
| 15 | + "source": { | |
| 16 | + "key": "brouwer-srg", | |
| 17 | + "name": "Parameters of strongly regular graphs (A. E. Brouwer)", | |
| 18 | + "url": "https://aeb.win.tue.nl/graphs/srg/srgtab51-100.html", | |
| 19 | + "id": "(99,14,1,2)", | |
| 20 | + "curator": "Andries E. Brouwer", | |
| 21 | + "status": "open", | |
| 22 | + "as_of": "2026-10-20", | |
| 23 | + "catalog": "0521c19bbd38" | |
| 24 | + } | |
| 25 | +} | |