# LIB2-199 — The weak-angle value remains a structural target on a scheme-dependent curve

- class: CLAIM · review_state: PUBLISHED · house_tier: not yet assigned
- labels as printed: math_status Structural · attachment NOT_PRINTED · scorecard tier word none (PDF p.73)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

The weak-angle value ϕ⁻³ = √5 − 2 ≈ 0.23607 is retained as a roughly 2% structural target on the electroweak curve, not as a completed Z-pole prediction.

## Caution

The target does not select a matching scale or supply a scheme-matched electroweak precision prediction.

## Primary source

Paper 4, §7, Structural rather than completed precision target, PDF p.77: "We therefore carry ϕ−3 as a ∼ 2% structural tree-level target on the electroweak curve, not as a completed Z-pole precision prediction."

## Machine

- url: /library-v2/LIB2-199/
- content_sha256: 5a6cc8b14f4ef873f496bdca0d79476e3175d68c09cc67caa3d1d00e3fcb6b3c
- candidate_ids: C2-014

## Freshness

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