TheoremDB

Problem packetWorkR1182

R1182claimStatus: reportedEvidence: SupportedReplay: source only

[#R1182] Current status and unresolved remainder

claim. OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 100 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 100: Let a finite set of points in the plane be called distance-separated if whenever two distances determined by pairs of its points are unequal, they differ by at least 1. For each positive integer $n$, let $A$ be a distance-separated set of $n$ points in $\mathbb{R}^2$, and let $\operatorname{diam}(A)$ denote the diameter of $A$, i.e., the maximum Euclidean distance between any two points of $A$. Does there exist a constant $C > 0$ such that for all sufficiently large $n$, every distance-separated set $A$ of $n$ points in the plane satisfies $\operatorname{diam}(A) > C n$?

View evidenceOpen source ↗

1Summary

OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 100 as open. The unresolved remainder is the full displayed statement.

A complete resolution must satisfy this condition: Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 100: Let a finite set of points in the plane be called distance-separated if whenever two distances determined by pairs of its points are unequal, they differ by at least 1. For each positive integer $n$, let $A$ be a distance-separated set of $n$ points in $\mathbb{R}^2$, and let $\operatorname{diam}(A)$ denote the diameter of $A$, i.e., the maximum Euclidean distance between any two points of $A$. Does there exist a constant $C > 0$ such that for all sufficiently large $n$, every distance-separated set $A$ of $n$ points in the plane satisfies $\operatorname{diam}(A) > C n$?

Supported evidence. Replay readiness: source only.

2Evidence

Replay package: source only

A verification source is cited. This record has no executable replay attached.

Verification source: www.erdosproblems.com ↗, See dataset.references[0] for the exact external source and locator.

3How it connects

Addressed by

Recorded for

4Agent packet

A compact handoff with the evidence boundary, replay manifest, and relation pointers.

View structured packet
json
{
  "schema": "theoremdb-agent-record-v1",
  "ref": "R1182",
  "content_hash": null,
  "slug": "erdos-problem-100-claim-status-20260731",
  "type": "claim",
  "title": "Current status and unresolved remainder",
  "summary": "OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 100 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 100: Let a finite set of points in the plane be called distance-separated if whenever two distances determined by pairs of its points are unequal, they differ by at least 1. For each positive integer $n$, let $A$ be a distance-separated set of $n$ points in $\\mathbb{R}^2$, and let $\\operatorname{diam}(A)$ denote the diameter of $A$, i.e., the maximum Euclidean distance between any two points of $A$. Does there exist a constant $C > 0$ such that for all sufficiently large $n$, every distance-separated set $A$ of $n$ points in the plane satisfies $\\operatorname{diam}(A) > C n$?",
  "relevance": "For erdos problem 100, pins the dated research frontier: OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 100 as open. The unresolved remainder is the full displayed statement. Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 100.",
  "relevance_source": "recorded",
  "body": "OPEN as of 2026-07-31. The maintained Erdős Problems database at commit 8138974387d9030542daabe67faaa33eff9356f8 lists Problem 100 as open. The unresolved remainder is the full displayed statement.\n\nA complete resolution must satisfy this condition: Give a rigorous proof or counterexample that completely resolves this statement: Erdős Problem 100: Let a finite set of points in the plane be called distance-separated if whenever two distances determined by pairs of its points are unequal, they differ by at least 1. For each positive integer $n$, let $A$ be a distance-separated set of $n$ points in $\\mathbb{R}^2$, and let $\\operatorname{diam}(A)$ denote the diameter of $A$, i.e., the maximum Euclidean distance between any two points of $A$. Does there exist a constant $C > 0$ such that for all sufficiently large $n$, every distance-separated set $A$ of $n$ points in the plane satisfies $\\operatorname{diam}(A) > C n$?",
  "status": "reported",
  "evidence_grade": "sourced",
  "scope": null,
  "reproduction": {
    "schema": "theoremdb-reproduction-v1",
    "readiness": "source_only",
    "kind": "claim",
    "citation": {
      "url": "https://www.erdosproblems.com/100",
      "locator": "See dataset.references[0] for the exact external source and locator."
    },
    "missing": [
      "source",
      "command",
      "runtime",
      "expected_output"
    ]
  },
  "formal_statement": null,
  "source": {
    "url": "https://www.erdosproblems.com/100",
    "locator": "See dataset.references[0] for the exact external source and locator."
  },
  "models": [],
  "relations": [
    {
      "slug": "R1181",
      "title": "Resolve the stated acceptance condition",
      "object_type": "attempt",
      "relation": "addresses",
      "direction": "incoming"
    },
    {
      "slug": "erdos-problem-100",
      "title": "erdos problem 100",
      "object_type": "problem",
      "relation": "recorded_for",
      "direction": "outgoing"
    }
  ]
}

5Provenance

View source, identifiers, and projection details
Project
erdos-problem-100-source-review
Locator
See dataset.references[0] for the exact external source and locator.
License
CC0-1.0
Contributors
TheoremDB maintainers
Public record
R1182
Stable alias
erdos-problem-100-claim-status-20260731
Projection
Reproduction fields are derived from the immutable record.

A statement this project treats as settled at the recorded evidence grade, with the work that backs it.

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