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The logarithmic Brunn–Minkowski conjecture
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Abstract
We prove the logarithmic Brunn–Minkowski conjecture for arbitrary origin-symmetric convex bodies in every dimension. The theorem also gives the symmetric Lp Brunn–Minkowski inequality for every $0\lt p\lt 1$. Combined with Saroglou's transfer theorem and a support-subspace reduction, it yields the logarithmic inequality for every even log-concave Radon measure and the scalar-dilation $(B)$-conjecture.
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Notes
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work in progress
Collected automatically by AI tools (Claude Opus 5.5 and GPT-6 Astra, 2026-10-21) and not checked by a person. May be wrong or incomplete. Report an error.
Follow-up works
- Yude Liu, Qiang Sun, Ge Xiong, The centered logarithmic Brunn–Minkowski inequality (arXiv:2610.10152, v1 7 Oct 2026, v2 8 Oct 2026). Proves the logarithmic Brunn–Minkowski and logarithmic Minkowski inequalities for convex bodies with centroid at the origin, with equality cases and L_p consequences for p > 0, citing this paper as its analytic starting point (ref. [24]); the authors report that independent human verification remains incomplete. [AI-generated per source]
- ChatGPT, prepared for Galyna Livshyts, Intersections of dilated convex sets and mixed-degree variance inequalities (public research note, 2026-10-11). Develops the manuscript’s moment-coordinate method into an equivalent intersection formulation of log-Brunn–Minkowski, functional dilation concavity and mixed-degree covariance bounds, without claiming historical novelty. [AI-generated per source]
Comments and discussion
- Galyna V. Livshyts, AI-generated math explorations (personal webpage, undated; accessed 2026-10-21). Describes prompting ChatGPT to develop theory around the OpenAI log-Brunn–Minkowski proof and highlights the resulting correlation-type exploration and shorter scalar B-conjecture argument.
Formalization
- OpenAI math release, Lean scope notes for family 091 (lean/docs/091.md, 2026-10-06). States that the formalization covers the Lebesgue-volume inequality of Theorem 1.1 for origin-symmetric convex bodies for every n ≥ 1 and 0 ≤ t ≤ 1, without smoothness or unconditionality assumptions; the L_p corollary and the measure/(B)-conjecture consequences are not listed in its scope. [family-level]
- OpenAI, ComparatorChallenges/LogBrunnMinkowski.lean (openai/math, commit adc7f12). The Comparator statement of Theorem 1.1, with the logarithmic combination defined as the Wulff shape of h_K^(1−t) h_L^t; the proof is left as
sorry. - OpenAI, lean/OAI/Geometry/LogVolume/BrunnMinkowski.lean (openai/math, commit adc7f12). This is the release's Lean proof file for the main theorem, about 24,500 lines long.
- anxkhn, Add the origin-symmetric logarithmic Brunn–Minkowski inequality (google-deepmind/formal-conjectures issue #6973, 8 Oct 2026). Proposes adding Theorem 1 (symmetric volume inequality only) to formal-conjectures; equality cases, measure extensions and L_p consequences are out of scope. [AI-generated per source]
- anxkhn, feat(Paper): add logarithmic Brunn–Minkowski (google-deepmind/formal-conjectures PR #6978, opened 8 Oct 2026, open). Adds the statement and a bridge to the release's Lean theorem, with the author reporting kernel checks using only standard axioms; reviewer bocowgill reports (10–11 Oct) that the statement and Wulff-body definitions match Theorem 1.1, with Comparator verification still marked incomplete. [AI-generated per source]
Related prior literature mentioned by others
- Christos Saroglou, More on logarithmic sums of convex bodies (Mathematika 62 (2016), arXiv:1409.4346). The VibeMathed (B)-conjecture entry identifies this transfer theorem (Theorem 3.1) as the route from Theorem 1.1 to Corollary 8.1; the paper's own bibliography also cites it.
- Károly J. Böröczky, The Logarithmic Minkowski conjecture and the L_p-Minkowski Problem (arXiv:2210.00194, v3 2024). Liu–Sun–Xiong (arXiv:2610.10152) cite this survey (their ref. [3]) for the centered conjectures they prove; it is not in this paper's bibliography.
- Dario Cordero-Erausquin, Liran Rotem, Improved log-concavity for rotationally invariant measures of symmetric convex sets (arXiv:2111.05110, 2021; Annals of Probability 51, 2023). Proves the (B)-conjecture for rotationally invariant log-concave measures, a special case of the paper's Corollary 8.1; the ChatGPT note prepared for Livshyts cites it as a predecessor.
Possibly relevant literature (found by the agent, not checked)
- Amir Livne Bar-on, The (B) conjecture for uniform measures in the plane (arXiv:1311.6584, 2013). It proves a planar (B)-type log-concavity for uniform measures on symmetric convex sets, which is earlier work on the measure consequence the paper derives in Section 8.
- Shouda Wang, Monotonicity of the deficit in the local log-Brunn-Minkowski inequality (arXiv:2510.19061, 2025). It gives another proof of the local inequality for zonoids, a case the paper attributes to van Handel in its survey of local results.
Digests and expositions
- ChatGPT, prepared for Galyna Livshyts, A concise proof of the scalar B-conjecture (public expository note, 2026-10-11). Extracts a direct scalar specialization of the manuscript’s moment-coordinate argument and identifies itself as neither independent human peer review nor formal verification. [AI-generated per source]
- Gradient Damage, Petty’s Projection Conjecture, Log Brunn–Minkowski Conjecture and 8 More (video compilation and accompanying page, 2026-10-15). The chapter beginning at 1:03 introduces the logarithmic Brunn–Minkowski claim and links the manuscript, presenting the animations as illustrations rather than proofs.
Elsewhere
- VibeMathed: Problem record
- VibeMathed: Problem record
- Emergent Mind: family 091
Independent sites; their content is not reviewed here.
Cite
@misc{OAI:The-logarithmic-Brunn-Minkowski-conjecture-September-23-2026,
author = {{OpenAI}},
title = {{The logarithmic Brunn--Minkowski conjecture}},
howpublished = {OpenAI Math Release preprint
\href{https://github.com/openai/math/blob/main/preprints/The-logarithmic-Brunn-Minkowski-conjecture-September-23-2026/paper.pdf}{OAI:The-logarithmic-Brunn-Minkowski-conjecture-September-23-2026}},
year = {2026}
}Lean formalization
OpenAI provides Lean files for this family: lean/docs/091.md. The Lean statements have not been checked by people against the paper's claims.
Family 091: Logarithmic and Lp Brunn–Minkowski inequalities and the B-conjecture
Proves the logarithmic Brunn–Minkowski inequality for origin-symmetric convex bodies in every dimension, and the scalar-dilation B-conjecture for all even log-concave Radon measures. For Lebesgue volume it also proves the additive Lp Brunn–Minkowski inequality for full-dimensional origin-symmetric convex bodies throughout $0\lt p\lt 1$.
This is the only paper in this family.