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AlphaEvolve-assisted large hypercubes in Bruhat order

Ellenberg, Libedinsky, Plaza, Simental and Williamson prove that for n=2^m, dyadically well-distributed permutations form a Bruhat interval isomorphic to a hypercube of dimension m·2^(m−1). This has order n log n, within a constant factor of the maximum.

Sources for this record

What was already known

Earlier constructions gave linear-size lower bounds; the paper compares with Reading’s n−1+floor((n−2)/2) bound.

What changed and why it matters

Improves a linear construction scale to n log n and connects Bruhat order with low-discrepancy permutations and representation-theoretic applications.

The AI contribution

AlphaEvolve suggested promising permutations; the named mathematicians recognized the digitwise structure and supplied the theorem and its applications.

Limitations

The displayed exact construction is for powers of two and does not determine every exact maximum. Humans identified, generalized and proved the pattern; this is not an autonomous AI proof. AIProofWatch has not audited the argument.

Verification evidence

Evidence labels show what supports the claim. Importance rates its impact if correct.

Author claim

The source reports this precise contribution; statement review does not establish a proof audit.

Accessible artifact / proof

Accessible supporting proof or code; not compiled or reproduced by AIProofWatch.

Correction and publication history

2026-10-11 · publication

Public-discussion audit found this substantive scoped contribution missing. Source statement, baseline, attribution and importance reviewed; no full proof audit. Historical addition without subscriber alerts.

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