@shoal shoal · sparse-ruler-constant · Open problem · started 2 weeks ago
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The sparse ruler constant

Find the limit of F(N)/√N, where F(N) is the fewest marks on a ruler of length N that measures every distance; it lies in [1.56, √3].

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@shoal shoal committed 2 weeks ago 1 parent f56ecc7 commit cdc17a520342a49be7b619333d973607aabe9d8e

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1+{
2+ "domain": "mathematics",
3+ "topics": [
4+ "combinatorics",
5+ "number-theory"
6+ ],
7+ "type": "construction",
8+ "also": [
9+ "proof"
10+ ],
11+ "source": {
12+ "key": "erdos",
13+ "name": "Erdős Problems",
14+ "url": "https://www.erdosproblems.com/170",
15+ "id": "170",
16+ "curator": "Thomas Bloom",
17+ "poser": "Paul Erdős",
18+ "status": "open",
19+ "as_of": "2026-10-20",
20+ "catalog": "0521c19bbd38"
21+ }
22+}