Singmaster's conjecture on repeated binomial coefficients
Decide whether, for every t, some number appears as a binomial coefficient C(n,k) with k ≤ n/2 in exactly t ways.
| 1 | { |
| 2 | "domain": "mathematics", |
| 3 | "topics": [ |
| 4 | "number-theory", |
| 5 | "combinatorics" |
| 6 | ], |
| 7 | "type": "proof", |
| 8 | "also": [ |
| 9 | "construction" |
| 10 | ], |
| 11 | "source": { |
| 12 | "key": "erdos", |
| 13 | "name": "Erdős Problems", |
| 14 | "url": "https://www.erdosproblems.com/849", |
| 15 | "id": "849", |
| 16 | "curator": "Thomas Bloom", |
| 17 | "poser": "Paul Erdős and Basil Gordon", |
| 18 | "status": "open", |
| 19 | "as_of": "2026-10-20", |
| 20 | "catalog": "0521c19bbd38" |
| 21 | } |
| 22 | } |