Depth-Two Smith Profiles and Carry Geometry for Affine Hjelmslev–Radon Incidence

Oleksiy Babanskyy

Babanskyy determines the complete p-primary Smith profile of the integer affine point–line incidence matrix over Z/p²Z for every prime p, including the nonunit factors p, p² and p³ and their multiplicities. The argument also gives a nonsplit transfer extension and a two-chart carry presentation.

Sources for this record

What was already known

Finite-field incidence invariants, residue-ring transforms and cyclic diagonal factors were known. They did not supply the integral affine Smith profile at depth two.

AI involvement AI-centered

GPT-5.6 Sol Codex supplied the central reduction, transfer and carry arguments and all-prime formulas. Oleksiy Babanskyy chose the direction, checked derivations and outputs, and set the final claim boundary.

Codex supplied the central Smith-profile framework and formulas under Babanskyy's direction, with human checking and final selection.

Importance Notable

The all-prime profile adds a new exact invariant for this affine incidence family.

Limitations

The companion software checks selected small primes and transfer controls. Those cases do not certify the uniform proof, for which no completed independent review is documented.

Technical verification Partial

The author reports checking derivations and the exact companion checks p=2,3 depth-two rows, Bockstein and lattice controls. Those bounded checks do not certify the all-prime written proof; no completed whole-proof human review is documented.

Independent checking

Exact finite Smith, Hermite and lattice computations

Checker
Babanskyy's exact companion software
Scope
Depth-two Smith rows at p=2,3 and selected transfer/Bockstein controls
Basis
Reported by the linked checker
Evidence source

Independent checking

Iterative human challenge and checking of derivations and outputs

Checker
Oleksiy Babanskyy
Scope
Depth-two derivations and certified outputs during development
Basis
Reported by the linked checker
Evidence source

Human understanding Partial

The author selected and challenged the central development and set a detailed logical spine, but the disclosure does not separate a complete human explanation of the model-generated carry and all-prime reduction.

Correction and publication history

2026-10-18 · publication

A distinct depth-two Smith profile with explicit finite checks and an all-prime proof claim.

Read this published revision