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The weak Pach-Tardos conjecture for acyclic matrix patterns

Proved, in the weak form: for every acyclic pattern PP, Ex(n,P)≤n1+OP(1/log⁡log⁡n)\mathrm{Ex}(n,P) \le n^{1+O_P(1/\log\log n)}, hence n1+o(1)n^{1+o(1)}. Stated as Theorem 1 in the language of ordered bipartite graphs: for all s,t≥1s,t \ge 1 and ε>0\varepsilon>0 there is n0n_0 such that every n×nn \times n ordered bipartite graph with n≥n0n \ge n_0 and at least n1+εn^{1+\varepsilon} edges contains a copy of every s×ts \times t ordered bipartite tree. The paper does NOT restore the original polylog conjecture, which stays refuted.

Exact FrontierDelta

Prior state unknown→proved

Scope and record

Occurred: Sep 17, 2026

Delta type: SOURCE CLAIM

Assumptions: VibeMathed verification: unreviewed. Publication: preprint. AI contribution: ai-co-developed. VibeMathed editorial classifications, scores, notes, relations, and dataset structure are CC BY 4.0. Source statements and linked content retain their own rights.

Canonical aliases: The weak Pach-Tardos conjecture for acyclic matrix patterns · Weak Pach-Tardos conjecture

Confidence: Not scored

Registry verification: unreviewed · preprint · resolved

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Attribution

VibeMathed
registry · event recorded by

ChatGPT-6 Astra
model · ai model contributor · OpenAI

Lior Gishboliner
human · human collaborator

Xiangyu Li
human · human collaborator

Lineage and corrections

This event attributed to Lior Gishboliner

Pettie and Tardos, the 2024 refutation of the original form evidence for this event

Proved, in the weak form: for every acyclic pattern PP, Ex(n,P)≤n1+OP(1/log⁡log⁡n)\mathrm{Ex}(n,P) \le n^{1+O_P(1/\log\log n)}, hence n1+o(1)n^{1+o(1)}. Stated as Theorem 1 in the language of ordered bipartite graphs: for all s,t≥1s,t \ge 1 and ε>0\varepsilon>0 there is n0n_0 such that every n×nn \times n ordered bipartite graph with n≥n0n \ge n_0 and at least n1+εn^{1+\varepsilon} edges contains a copy of every s×ts \times t ordered bipartite tree. The paper does NOT restore the original polylog conjecture, which stays refuted. parent of this event

This event attributed to ChatGPT-6 Astra

VibeMathed record: The weak Pach-Tardos conjecture for acyclic matrix patterns evidence for this event

The weak Pach-Tardos conjecture for acyclic matrix patterns parent of this event

This event attributed to Xiangyu Li

The weak Pach-Tardos conjecture for acyclic matrix patterns evidence for this event

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The weak Pach-Tardos conjecture for acyclic matrix patterns — Mathematical Frontier Network