Theorem · version 1

A cubic witness in four real variables

Statement

For j = 1,2 put Zj=(Xj+iYj)/2Z_j=(X_j+iY_j)/\sqrt2 and Wj=(Xj−iYj)/2W_j=(X_j-iY_j)/\sqrt2. Set P4=(1+Z2)(W1(1−Z1)+W2)P_4=(1+Z_2)(W_1(1-Z_1)+W_2) and Q4=Z2Q_4=Z_2. For every m ≥ 1, E[P4m]=0\mathbb E[P_4^m]=0 and E[Q4P4m]=m!\mathbb E[Q_4P_4^m]=m!.

Assumptions

  • The four real coordinates X₁,Y₁,X₂,Y₂ are independent standard Gaussians.
  • Each Wⱼ is the conjugate of Zⱼ.

Scope

A different witness: degree three with four real coordinates. The lower-dimensional quartic does not replace this degree statement.

Explanation

In Gaussian moments conjecture · publication v5

Constructions · 1

In Gaussian moments conjecture · publication v6

Constructions · 1

Evidence

Source reports

Connections

In this problem · publication v5 · Selected context

Gaussian moments conjecture →

Supporting result · Proved

Relationship not independently reviewed. This concerns its use in this problem.

In this problem · publication v6

Gaussian moments conjecture →

Supporting result · Proved

Relationship not independently reviewed. This concerns its use in this problem.

Sources

Small Counterexamples to the Gaussian Moments Conjecture →

Christopher D. Long · Preprint · Publication date Jul 20, 2026

Revision & attribution

Source revision: 2026-07-20. Observed Oct 13, 2026.

Long credits ChatGPT 5.6 Sol Pro with the four-variable polynomial, Claude Fable 5 with the three-variable reduction and checks, and ChatGPT with editing. Long is the paper’s author and responsible for its mathematical claims.

History

Statement versions

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Assessment history · 1

Assessments retained in these publication records. Earlier statement versions retain their own source histories.

Record details
Claim ID
claim-gaussian-moments-four-variable-witness
Statement version
1
SHA-256
3beff1d51d7f1b50f0e2ba7b26420e4c7a222d5d93792727497a7ba29705b6a4

Publication records