# LIB2-074 — PMNS unitarity is exact within its standard-form construction

- class: CLAIM · review_state: PUBLISHED · house_tier: not yet assigned
- labels as printed: math_status Proved · attachment NOT_PRINTED · scorecard tier word none (PDF p.58)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

For the displayed standard-form PMNS matrix, U†U = I exactly by construction.

## Caution

Exact unitarity is not an independent falsification target and does not derive the input angles or their physical attachments.

## Primary source

Paper 3, §3.2, PMNS construction, PDF p.56: "Unitarity is exact by construction: U † U = I."

## Machine

- url: /library-v2/LIB2-074/
- content_sha256: 638b8c99d6e53841c3bf7ab46013c33e8a439f48c26d39ad2146d7a7587fe10c
- candidate_ids: C2-066

## Freshness

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