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The Lane–Emden and Hénon–Lane–Emden conjectures

OpenAI groups related papers into a “family”. OpenAI’s catalogue describes this one:

Resolves the subcritical Lane–Emden conjecture and its weighted Hénon extension. For n ≥ 2, \(p,q\gt 0\) and real A, B, the system \(-\Delta u=|x|^A v^p\), \(-\Delta v=|x|^B u^q\) has no positive entire solution when \((n+A)/(p+1)+(n+B)/(q+1)\gt n-2\), with solutions continuous at the origin and classical elsewhere. No symmetry or growth assumption is needed. Known radial existence gives the exact existence criterion for n ≥ 3 and \(A,B\gt -2\). (OpenAI’s Lean note)

Lean is a language for mathematical statements and proofs that a computer can verify. The assessments below ask whether those statements express the result OpenAI describes here.

Both independent assessments find that the Lean statements express or imply the whole result described above. Read the assessments

What the papers state

Theorem 1.1

In The Subcritical Hénon–Lane–Emden Conjecture, 24 September 2026

The paper’s main theorem is shown as a possible match to OpenAI’s description. No review confirming the selection is recorded.

Let n\ge2 be an integer, let p,q>0, and let A,B\in\R. Suppose that

\frac{n+A}{p+1}+\frac{n+B}{q+1}>n-2.

There are no functions

u,v\in C^2(\R^n\setminus\{0\})\cap C(\R^n), \qquad u(x)>0,\quad v(x)>0\quad(x\in\R^n),

satisfying Equation (1.1) at every x\ne0.

No Lean statement in the release is paired with this theorem.

Corollary 1.2 (Unweighted Lane–Emden conjecture)

In The Subcritical Hénon–Lane–Emden Conjecture, 24 September 2026

Possible match to OpenAI’s description, selected because it shares the most wording. No review confirming the selection is recorded.

For every integer n\ge3 and p,q>0 satisfying

\frac{1}{p+1}+\frac{1}{q+1}>\frac{n-2}{n},

there is no strictly positive C^2(\R^n) solution of

-\Delta u=v^p,\qquad -\Delta v=u^q\qquad\text{in }\R^n.

The release does not say which paper theorem its catalogue describes. Both statements above are shown whole: the paper’s main theorem first, then the statement that shares the most wording with the description. The atlas has not reviewed either choice.

Reported proof verification
One Lean statement in the release; two independent groups report that Comparator accepted runs for this file at the version shown here.

Papers

Each paper opens as a reading page in the browser, with the PDF beside it. The statements each paper opens with are on its reading page.

The Subcritical Hénon–Lane–Emden Conjecture

24 September 2026, current edition.

Read it herePDF

We prove the subcritical Hénon–Lane–Emden conjecture: for every dimension n ≥ 2, positive powers p, q, and real weights A, B, the system has no strictly positive entire solution when \((n+A)/(p+1)+(n+B)/(q+1)\gt n-2\). Solutions need only be continuous at the origin and classical elsewhere, without a condition at infinity. For n ≥ 3 and \(A,B\gt -2\), combining this result with the radial existence theorem of Bidaut-Véron and Giacomini proves Phan’s Conjecture C in full: a positive radial entire solution exists whenever the strict inequality fails.

One Lean statement in this family

Lean is a language for mathematical statements and proofs that a computer can verify. The Lean statement below is shown beside its possible paper counterpart, with the reason they were linked.

For a configured theorem, the Comparator program tests whether OpenAI’s separate proof proves the exact Lean statement using only the allowed axioms. Some statement files instead configure definitions for comparison by name and type. Acceptance does not establish that a formal statement means the same thing as the paper’s theorem.

HenonEmden

The paper states

The words they share: emden, lane, positive, satisfying, unweighted.

Possible Lean counterpart

Selected from shared wording. No review of whether the statements mean the same thing is recorded.

Subcritical Hénon–Lane–Emden nonexistence

HenonEmden.lean, the release lists it as a main result.

theorem main_nonexistence (n : ℕ) (hn : 2 ≤ n) (p q A B : ℝ)    (hp : 0 < p) (hq : 0 < q) (hsub : Subcritical n p q A B) :    ¬ ∃ u v : Space n → ℝ, IsSolution n p q A B u v := by  sorry

This file states the theorem with sorry, a placeholder, in place of its proof. OpenAI supplies a separate proof file. Comparator tests whether that proof proves the statement here.

two independent groups report that Comparator accepted runs for this Lean statement file: cert-machine; MathVet. Who ran the proof-verification program

  • cert-machine records it as “CERTIFIED”.
  • MathVet records it as “comparator-sandboxed-pass”.

Read the complete Lean statement

Other mathematical statements in OpenAI’s Lean library

Atlas found these propositions by scanning the text of the project’s Model.lean file. Each name links to its definition, with any associated statement file beside it. This list does not record running Lean to interpret or verify those definitions.

Independent comparisons and proof-verification reports

Does the Lean express the advertised result?

MathVet and cert-machine agree on how much of the advertised result the Lean statements express.

MathVet and Carlos Toledo’s cert-machine independently assessed whether this family’s Lean statements express the whole result OpenAI describes in its catalogue. These are assessments of the family as a whole, not of each paper theorem separately.

MathVet finds that the Lean statements express or imply the whole advertised result (their term: “full”).

Their note: main_nonexistence: for n ≥ 2, p, q > 0, real A, B and (n+A)/(p+1) + (n+B)/(q+1) > n-2 there are no positive u, v continuous on ℝⁿ and C² off the origin with -Δu = |x|^A v^p and -Δv = |x|^B u^q for x ≠ 0, with no symmetry or growth assumption; the radial existence criterion mentioned in the summary is background and not stated.

“full”, in their words: The challenge statements imply the headline claim after unpacking definitions or one routine step.

Their method: An independent, model-assisted, pre-referee reading of each family’s challenge statements against its headline claim under a published rubric (PROTOCOL.md), with its own Comparator runs per challenge.

cert-machine finds that the Lean statements express or imply the whole advertised result (their term: “MATCHES”).

“MATCHES”, in their words: The challenge statements state the headline as OpenAI wrote it.

Their method: Every Comparator challenge re-run on Linux with nanoda switched on, decided by a preregistered rule.

OpenAI’s own note on what its Lean covers

The formalized result proves nonexistence of positive entire solutions to the subcritical Hénon–Lane–Emden system. For $n\ge2$, $p,q>0$, and real $A,B$ with $(n+A)/(p+1)+(n+B)/(q+1)>n-2$, there are no positive functions, continuous everywhere and $C^2$ off the origin, satisfying $-\Delta u=|x|^A v^p$ and $-\Delta v=|x|^B u^q$ away from the origin. It includes the globally $C^2$ unweighted case for $n\ge3$. The critical equality case is not included.

AI-drafted comparisons, with no recorded human review

  • Subcritical Hénon–Lane–Emden nonexistence HenonEmden

    Unreviewed AI draft: states a paper’s theorem as the paper does. States the main theorem: nonexistence of positive solutions of the subcritical Hénon–Lane–Emden system, including the unweighted corollary. The critical case is not included.

Who ran the proof-verification program?

These groups report running Comparator with the release’s Lean statement files. For a configured theorem, it verifies OpenAI’s separate proof against the exact statement; some files instead configure definitions for comparison by name and type. Each row is the named group’s report. Atlas has not repeated the runs.

These reports do not list the software versions, proof-verification programs, axioms, time or memory in separate fields. Any such details in a report’s prose are reproduced below.

Subcritical Hénon–Lane–Emden nonexistence HenonEmden

Two reports, all at the release’s recorded version.

Reported byTheir wordTheir accountDateOriginal report
cert-machine“CERTIFIED”Re-run through Comparator with the independent nanoda kernel switched on: Lean’s kernel and nanoda both accept OpenAI’s solution.10 October 2026Original report
MathVet“comparator-sandboxed-pass”Re-run through Comparator in a sandboxed virtual machine: accepted.8 October 2026Original report

What these papers cite in the release, and what cites them

These links come from the papers’ bibliographies. A citation records that one paper cites another; how each cited result is used has not been examined here.

Papers elsewhere in the release that this family’s papers cite

This family’s papers cite no paper elsewhere in the release.

Papers elsewhere in the release that cite this family’s papers

No paper elsewhere in the release cites this family’s papers.

References outside the release

Each paper’s outside references are listed with it on its reading page, where each citation is placed. Every outside work cited in the release: References outside the release

Explain a result, compare statements or propose a correction

Atlas has no contributed explanation for this family yet. You can offer one with a GitHub account. You receive named credit and disclose any AI assistance.

Each button opens a GitHub form with this page and its source version filled in. Opening the form does not reserve the work.

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What people have said

Commentary on this family by others, dated and credited. It is commentary, not a finding.

  • An unsigned public tier list, the OpenAI Math Tier List, classes it as a proof and rates its significance, if it holds up, as “Major math journal”. The page says that nothing on it is verified.

    Author not stated. Source

Questions awaiting review

Each item identifies a statement, definition or report that needs further review. Its link opens a GitHub form with the source version already recorded.

Read the Lean statement against the paper

  • An AI agent drafted an assessment of which part of the paper this Lean statement expresses. No named human review is recorded. Open the form

Identify the theorem the catalogue describes

  • Family 370 The theorem shown was selected from shared wording with OpenAI’s description. Atlas records no review confirming that it is the theorem the description means. Open the form

Compare the proposed paper and Lean matches

  • Family 370 Atlas records no review of whether each linked Lean statement and paper theorem mean the same thing. Open the form