Tilt-stable log-Sobolev conjecture for log-concave measures

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Let μ\mu be a log-concave probability measure on Rn\mathbb R^n. It is β\beta-tilt-stable if, for every h∈Rnh\in\mathbb R^n, the covariance operator of the tilted measure τhμ\tau_h\mu is bounded by β2In\beta^2 I_n in operator norm, where τhμ\tau_h\mu is the normalized tilt of μ\mu by eh⋅xe^{h\cdot x}. Tilt-stable log-Sobolev conjecture. If μ\mu is a β\beta-tilt-stable log-concave probability, then

ρLS(μ)≲β.\rho_{LS}(\mu)\lesssim\beta.

The source states this as a weaker consequence of the preceding log-Sobolev KLS conjecture, using that tilt-stability implies sub-Gaussianity up to a universal factor. Its general validity remains open.

References

Primary source

Pierre Bizeul, “On the Log-Sobolev Constant of Log-Concave Vectors”, arXiv:2306.12997 (2026).

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RemarkAI-assistedClaimed by OpenAI. The manuscript claims an entropy-energy logarithmic Sobolev inequality with coefficient CK^2 for centered log-concave densities having uniformly K-subgaussian linear marginals. A tilt covariance bound beta^2I implies K=O(beta), giving coefficient C*beta^2 in this full-dimensional subcase. This uses the usual square-root normalization of the page’s rho_LS; the entropy coefficient itself is quadratic in beta.See full solutionHide full solution

Claimed by OpenAI. The manuscript claims an entropy-energy logarithmic Sobolev inequality with coefficient CK^2 for centered log-concave densities having uniformly K-subgaussian linear marginals. A tilt covariance bound beta^2I implies K=O(beta), giving coefficient C*beta^2 in this full-dimensional subcase. This uses the usual square-root normalization of the page’s rho_LS; the entropy coefficient itself is quadratic in beta.

GitHub repository: https://github.com/openai/math

Manuscript: https://github.com/openai/math/blob/adc7f1241b42e322a6451854ab7e4b4c146bf78a/preprints/A-dimension-free-logarithmic-Sobolev-inequality-for-subgaussian-log-concave-measures-September-23-2026/paper.pdf

  • OpenAI-093-01-A-dimension-free-logarithmic-Sobolev-inequality-for-subgaussian-log-concave-measures.pdf712,415 bytesOpen