GPT-5.4 Pro
GPT-5.4 Pro found a four-way frame construction giving a uniform constant-factor improvement over the known recurrence, starting at $n = 15$.
Provider: OpenAI · Prompt public: unknown · Independence: unknown
Problem detail · source-aware
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Let $H(n)$ be the largest number of vertices in a hypergraph with no isolated vertices and no partition of size greater than $n$. With $k_1 = 1$ and $k_n = \lfloor n/2 \rfloor + k_{\lfloor n/2 \rfloor} + k_{\lceil n/2 \rceil}$, prove $H(n) \ge c\,k_n$ for some constant $c > 1$, already for $n = 15$, with a constructive algorithm.
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GPT-5.4 Pro found a four-way frame construction giving a uniform constant-factor improvement over the known recurrence, starting at $n = 15$.
Provider: OpenAI · Prompt public: unknown · Independence: unknown
Verified by the problem's contributor, who is preparing the argument for publication; problem and status tracked publicly.
Correctness: unknown · statement fidelity: unaudited · peer review: none
VibeMathed reports this item as resolved. VibeMath preserves that report as a source assertion and has not independently authored a plain-language mathematical explanation.
Source-reported tools: construction.
Independent: unknown · difference confidence: 0
VibeMath has not independently audited the mathematical statement, proof, or novelty claim.