Problem packetResearch packetR701
Determine the growth order of the triangular-game P-positions
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The recorded evidence grade has no defined assessment here. The outcome applies to this attempt's recorded scope.
Attempt outcome: open strategy
Recorded scope: No scope is recorded.
Originating problem: Density of losing positions in the subtract-a-triangular game
Authored record and scope
- Authored title
- Determine the growth order of the triangular-game P-positions
- Record type
- attempt
- Stored status
- open_strategy
- Evidence grade
- proposed
Work and source credit
- Recorded action
No action description supplied.
- Authored result summary
The density question is settled, while the size of \(P\cap[1,N]\) remains a sharper quantitative target.
- Reported outcome
No separate outcome supplied.
- Recorded status
open_strategy
- Recorded evidence grade
proposed
- Recorded scope
No explicit scope supplied.
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2Authored explanation
Let \(T(N)\) be the number of positive triangular numbers at most \(N\). Maximality of the P-position set gives \((L(N)+1)(T(N)+1)\geq N+1\), hence \(L(N)=\Omega(\sqrt N)\). Polynomial recurrence gives \(L(N)=o(N)\). The computation through 200,000 is compatible with a much smaller order than the linear scale. Establishing a sharp exponent or asymptotic for this greedy triangular-difference-free set is a possible replacement question. Its novelty needs a separate literature review.
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3Outcome
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Verification source: oeis.org ↗, Quantitative refinement of the sequence recorded as OEIS A030194
4How it connects
Uses
- claim
- artifact
Recorded for
- problem
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"title": "Determine the growth order of the triangular-game P-positions",
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"body": "Let \\(T(N)\\) be the number of positive triangular numbers at most \\(N\\). Maximality of the P-position set gives \\((L(N)+1)(T(N)+1)\\geq N+1\\), hence \\(L(N)=\\Omega(\\sqrt N)\\). Polynomial recurrence gives \\(L(N)=o(N)\\). The computation through 200,000 is compatible with a much smaller order than the linear scale. Establishing a sharp exponent or asymptotic for this greedy triangular-difference-free set is a possible replacement question. Its novelty needs a separate literature review.",
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"slug": "R702",
"title": "Subtract-a-triangular losing positions have density zero",
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}6Provenance
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