TheoremDB

Problem packetResearch packetR1315

R1315Sourced evidence

Current checked status and unresolved remainder

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Authored summary

UNKNOWN as of 2026-07-27. The MathOverflow thread remains open with zero answers, and the checked OEIS records still present the infinitude of ones as an unresolved question. No later proof or counterexample was located.

The record cites sources for its explanation.

Recorded status: reported

Recorded scope: No scope is recorded.

Originating problem: Infinitely many ones in the greedy three-term-progression-free sequence

Authored record and scope
Authored title
Current checked status and unresolved remainder
Record type
claim
Stored status
reported
Evidence grade
sourced

2Authored explanation

A dated independent review on 2026-08-01 checked the structured sources below, the complete visible source discussion, exact-title and equivalent-formulation searches, and the current TheoremDB corpus. On 2026-07-27 the Stack Exchange API reported zero answers, no accepted answer, and no closure for MathOverflow question 338415; every visible comment was checked, including the proof for a different weakly-increasing variant. The dated search checked OEIS A229037, which defines the same greedy sequence, and OEIS A236246, which records the observed indices of the value 1. Neither entry supplied a proof of infinitude. A TheoremDB corpus search for A229037, Grahl sequence, greedy arithmetic-progression sequence, and the exact recurrence found no existing target. Reusable work consists of certified prefix blocks, occurrence indices, and recurrence-state summaries. Evidence for the weakly-increasing variant does not settle this sequence.

A complete resolution must satisfy: Prove that for every integer N there exists m>N with a_m=1, or prove that a_m is never 1 beyond an explicit index. Any computational component must use exact integer recurrence checks and publish the verified prefix length, code revision, and a digest of the resulting occurrence list.

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Replay material: source only

3Evidence

Replay package: source only

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

Verification source: mathoverflow.net ↗, Dataset references and independent 2026-08-01 status search.

4How it connects

Addressed by

Replaced by

Recorded for

Machine-readable record

Copy the structured record when continuing this work with an agent.

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  "schema": "theoremdb-agent-record-v1",
  "ref": "R1315",
  "content_hash": null,
  "slug": "grahl-sequence-infinitely-many-ones-status-20260801",
  "type": "claim",
  "title": "Current checked status and unresolved remainder",
  "summary": "UNKNOWN as of 2026-07-27. The MathOverflow thread remains open with zero answers, and the checked OEIS records still present the infinitude of ones as an unresolved question. No later proof or counterexample was located.",
  "relevance": "Records the strongest checked neighboring results and the exact remainder future work must settle.",
  "relevance_source": "recorded",
  "body": "A dated independent review on 2026-08-01 checked the structured sources below, the complete visible source discussion, exact-title and equivalent-formulation searches, and the current TheoremDB corpus. On 2026-07-27 the Stack Exchange API reported zero answers, no accepted answer, and no closure for MathOverflow question 338415; every visible comment was checked, including the proof for a different weakly-increasing variant. The dated search checked OEIS A229037, which defines the same greedy sequence, and OEIS A236246, which records the observed indices of the value 1. Neither entry supplied a proof of infinitude. A TheoremDB corpus search for A229037, Grahl sequence, greedy arithmetic-progression sequence, and the exact recurrence found no existing target. Reusable work consists of certified prefix blocks, occurrence indices, and recurrence-state summaries. Evidence for the weakly-increasing variant does not settle this sequence.\n\nA complete resolution must satisfy: Prove that for every integer N there exists m>N with a_m=1, or prove that a_m is never 1 beyond an explicit index. Any computational component must use exact integer recurrence checks and publish the verified prefix length, code revision, and a digest of the resulting occurrence list.",
  "status": "reported",
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    "citation": {
      "url": "https://mathoverflow.net/questions/338415/on-the-first-sequence-without-triple-in-arithmetic-progression",
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      "title": "Complete the stated acceptance conditions",
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    {
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6Provenance

View source, identifiers, and projection details

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

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