# LIB2-277 — Superseded early cubic-phase ansatz for the leptonic Dirac phase

- class: RETIRED · 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": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

The early PMNS phase prompts proposed a cubic-invariant ansatz as the leptonic Dirac-phase target; the current print types δCP = −2π/√5 = −160.997° Derived-conditional (Rev29 re-tiering; the pre-Rev29 stamp was Theorem ⋆100).

## Caution

The new target remains conditional on its readout premises; replacement does not prove that the archived prompt contained a completed derivation.

## Primary source

Paper 7, §7, D4 closed: old ansatz superseded, PDF p.120: "The old ansatz value −133.36◦ is superseded."

## Machine

- url: /library-v2/LIB2-277/
- content_sha256: ee4ffe5f305b235afa3de4ffb2da25339a0566a769b971b0342c55f3f79a5d2d
- candidate_ids: C2-007 C2-061

## Freshness

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