# 490d C391 — Conditional equivalence of the E/J motif and the529 P/J side

24 September 2026. Step 8 of 10 in the C384–C393 authorization.

**Within the fixed coherent-family domain, the admitted E/J motif and the established common-P/J529-side contexts coincide.** The source equations explain the correspondence; they do not create a new independent witness for529.

Let h be the adjacent source gain. The admitted Shem lifespan600, expanded by J from the preceding source birth gap, forces h=600/300=2. The target Noah-to-Shem distance500 is250h. Applying E to the held-Noah input distance therefore forces

`N−x = (23/25)×500 = 460 = 230h`.

The original Flood-pivot J edge has x−A=598=299h. Consequently,

`N−A = (230+299)h = 529h = 1058`.

The relation230+299=23² is exact. In this motif, however, it is derived from the500/600 source geometry and the retained ratios; it was not a separate observation to be counted again.

The target's existing next-Gear Flood supplies the original P pivot B. Source Noah-to-Flood600 gives B=N−299h. Hence x−B=69h and y−B=70h, so P reaches the same source output. This reconstructs the original common-P/J comparison without fitting a pivot. All eight E/J context lifts correspond bijectively to the eight previously recorded P/J lifts at four coordinate configurations.

Several held-Noah distances now fit in one exact scale description:

|Distance from the first held Noah|Coefficient of h|
|---|---:|
|Original MT Noah input|230|
|Its E image: SP/LXX Shem birth|250|
|Original P Flood pivot|299|
|Static E image of P pivot|325|
|Original J Flood pivot|529|
|Transported J Shem-death pivot|549|
|Static E image of J pivot|575|
|Second E image of the original J pivot|625|

The scalar relations are230→250,299→325,529→575→625 under E. These recover the retained1058→1150→1250 ladder at h2; they do not claim novelty over the earlier scalar reports. Only source-admitted endpoint realizations count as edges. C392 will census those edges directly at the existing held Noah points.

The new target side is measured from the *next* Noah:550h=1100. Its excess over529h is21h=42. The required transported P pivot remains absent, so the finite correspondence does not establish a joint E/P/J source action or a global Mirror invariant.

## Verification and limits

43 main checks and 16 frozen-input/predecessor authentication checks passed. A second main replay produced byte-identical DATA/RESULTS. These checks and the source interpretation were performed by the root agent; no new independent-agent review is claimed. All frozen originals and standing controls remain unchanged. Verification counts are not independent-witness counts.

The normalized h family is algebra; onlyh2 and the recorded sources are admitted here. Equivalence is conditional on the finite family motif, not a universal equivalence of protocols or independent corroboration.

Mirror/529 focus: K=529, E=25/23, P=70/69. Global paired Mirror January AD1; local junction January AD2; no civil year zero. Regular Gears are Noah/Shem/Flood only. SP minus-one person companions remain local to SP Noah/Shem; Flood close is a separate boundary. No upstream/cumulative Gear, new endpoint or phase, fitted anchor, global axis, primer reopening, canonical or graph edit. Capture now; canonize later. Source identity, context, modal binding, generated coordinates and phase ancestry stay distinct.

## Decision after this result

**C392, proposed and unexecuted:** At the four already selected held Noah coordinates, enumerate all exact E images inside the frozen regular register. Classify the source-labelled edges and maximal paths, and determine precisely how the new E/J square sits beside the older double-E ladder.

The equations suggest a shared held-Noah source geometry. A finite graph census at those existing pivots can distinguish actual links from scalar identities before the final synthesis.