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Engineering Record v0.4 2026-07-24 ALL_FOUR_RADII_BLOCKED

Support–Prime Dual Frontier

Support–Prime Dual Frontier v0.4 — Expands the dual witness method to four support radii, all of which are blocked by safe lower bounds (2.62 → 1.09), while catching a methodological trap: coarse axis grids generate false escapes. The prime enumeration cost at R=16 has reached 79 trillion terms.

RH_CLAIM = False — The files in the package self-report "not a proof of RH, not a disproof of RH, nor an interval certificate for the continuous analytic problem", reproduced here as-is. The safe lower bounds for all four radii are strictly greater than 1, and all 12 witnesses are floating-reconstructed and remain PSD.

Connections

This package generalizes the dual witness method of the previous package to multiple support radii, quoting its decisions as-is.

"Increasing R is no longer the primary direction. The next node co-designs axis notches, dictionary, and cover, and requires any α<1 result to undergo a dense-axis audit." — Excerpted from this package's RESULTS.md § Decision.
Previous Node · v0.3Axis-Target Dual Obstruction

Technical Notes

Main Document — Uniform frontier scanning, joint dual optimization of 288 sub-rectangles, coarse-axis grid false escape diagnostics, actual prime enumeration, and spectral gap steering decisions.

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Result Data

Safe lower bound table for four radii, coarse grid false escape comparison, uniform frontier summary, and prime costs, from RESULTS.md within the package.

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Trust Boundaries

From TRUST_BOUNDARY.md within the package.

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Files

The large-scale spectral scan data (uniform_frontier.json 186 KB) and prime histograms (prime_histograms.npz) are not listed individually; they are all in the full zip file.

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Download Complete Package (176.7 KB)

sha256 dc8240726dd87779e367c40b13d12060ba7cfeda6741dfafdedc790859366363