Source authenticated

The Nam-Sly-Zhang conjecture: the free Ising state on the d-regular tree is a factor of IID up to the reconstruction threshold

Theorem 1.1: for every d≥3d\ge3 and β≥0\beta\ge0, μd,β\mu_{d,\beta} is a factor of IID if and only if tanh⁡β≤(d−1)−1/2\tanh\beta\le(d-1)^{-1/2}; the new part is the positive implication including equality, and the factor can be chosen to commute with every automorphism on every input. The converse is Sly's, as given by Lyons, with the Backhausz-Szegedy-Virag bound. The construction inverts the innovations of the Nam-Sly-Zhang stochastic-localization observation process. It does not treat antiferromagnetic or nonzero-field states, other Gibbs measures, or finitary factors.

Exact FrontierDelta

Prior state unknown→proved

Scope and record

Occurred: Sep 26, 2026

Delta type: SOURCE CLAIM

Assumptions: VibeMathed verification: lean-checked. Publication: announcement. AI contribution: ai-discovered. 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 Nam-Sly-Zhang conjecture: the free Ising state on the d-regular tree is a factor of IID up to the reconstruction threshold · Free Ising on trees as a factor of IID

Confidence: Not scored

Registry verification: lean checked · announcement · candidate

Open the source record ↗

Attribution

VibeMathed
registry · event recorded by

Unreleased internal OpenAI model
model · ai model contributor · OpenAI

Artifacts and verifiers

Lean: OAI/Probability/FreeIsing/Main.lean

lean artifact · pending

Artifact ↗

Compute record

No linked compute attempts recorded.

Lineage and corrections

Nam, Sly and Zhang, Ising model on trees and factors of IID (arXiv 2012.09484) evidence for this event

This event attributed to Unreleased internal OpenAI model

The Nam-Sly-Zhang conjecture: the free Ising state on the d-regular tree is a factor of IID up to the reconstruction threshold evidence for this event

Lean: OAI/Probability/FreeIsing/Main.lean evidence for this event

Lyons, Factors of IID on trees (arXiv 1401.4197) evidence for this event

Theorem 1.1: for every d≥3d\ge3 and β≥0\beta\ge0, μd,β\mu_{d,\beta} is a factor of IID if and only if tanh⁡β≤(d−1)−1/2\tanh\beta\le(d-1)^{-1/2}; the new part is the positive implication including equality, and the factor can be chosen to commute with every automorphism on every input. The converse is Sly's, as given by Lyons, with the Backhausz-Szegedy-Virag bound. The construction inverts the innovations of the Nam-Sly-Zhang stochastic-localization observation process. It does not treat antiferromagnetic or nonzero-field states, other Gibbs measures, or finitary factors. parent of this event

The Nam-Sly-Zhang conjecture: the free Ising state on the d-regular tree is a factor of IID up to the reconstruction threshold parent of this event

VibeMathed record: The Nam-Sly-Zhang conjecture: the free Ising state on the d-regular tree is a factor of IID up to the reconstruction threshold evidence for this event

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