# LIB2-240 — Retired Shilov atmospheric-angle derivation

- class: RETIRED · review_state: PUBLISHED · house_tier: not yet assigned
- labels as printed: math_status None · attachment None · scorecard tier word none (PDF p.None)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

The earlier atmospheric-angle route presented a Shilov-boundary correction as the operative prediction.

## Caution

The old arctangent target is not the separate retired rational target, and the new physical branch remains a loaded correspondence.

## Primary source

Paper 7, §7, Atmospheric-angle precedent, PDF p.120: "The current framework value is the mismatch-geometry branch sin2 θ23 = 7/16, rather than the older higher-octant phenomenological placeholder — printed since Rev32.6 as the sharp loaded lower-branch target of the selected corre- spondence (A1566: the octant registration is a candidate map, not a selector; the internal identity stays theorem-grade)."

## Machine

- url: /library-v2/LIB2-240/
- content_sha256: 760b61006b1cb95b8e3c80ab36fade0b4aa821f2ea8391a4517f60e155b7d764
- candidate_ids: C2-168

## Freshness

- BUILD_STAMP S371a · 2026-09-26T22:53Z · master 01d1a5873ede42f5 · cut 9dcc6ce9a8ee3e02
- Declared volatile fields (R36): BUILD_STAMP