# LIB2-308 — Derive the sign that selects the atmospheric-octant registration

- class: OPEN · review_state: IN_REVIEW · house_tier: not yet assigned
- labels as printed: math_status None · attachment None · scorecard tier word none (PDF p.None)
- basis: {"pdf_sha256_prefix": "fa19bd8048299dac", "release": "Rev33.2_S398"}

## Statement

Can a registered odd coupling with a theory-fixed sign exclude the mirror atmospheric-octant registration without using the target angle, phase or observed charge-sign data?

## Caution

An odd carrier alone does not derive the physical lower-octant attachment or alter the internal mismatch identity.

## Primary source

Appendix N, Part N.E, Atmospheric-octant reopen condition, PDF p.274: "a registered loaded odd object Ω23 with a theory-fixed sign in a coupling such as Slink = −κ χodd cos 2θ23 , plus a pre-registered mirror control proving the countermap impossible without using θ23 , δ, or observed charge-sign data."

## Machine

- url: /library-v2/LIB2-308/
- content_sha256: d4eab82722231d4e77e2ed5e0507e7c19e1c9f7dd568eda8e4b616ec379369eb
- candidate_ids: C2-005 C2-059

## Freshness

- BUILD_STAMP S398a · 2026-10-08T02:02Z · master ce86ef9d3e000f28 · cut b6fdbc7745cbd4cd
- Declared volatile fields (R36): BUILD_STAMP