# LIB2-018 — DET-7 is a structural postulate in the algebraic selector

- class: CLAIM · review_state: PUBLISHED · house_tier: not yet assigned
- labels as printed: math_status NOT_PRINTED · attachment NOT_PRINTED · scorecard tier word none (PDF p.164)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

In Appendix E's algebraic selector, det Gram(Jvac,Jvac#) = 7 is imposed as the DET-7 structural postulate, not derived as a necessity.

## Caution

This postulate does not establish its own first-principles necessity or the physical attachment of the resulting invariant.

## Primary source

Appendix E, §3, Remark 2: status of H2, PDF p.171: "DET-7 enters this appendix as a structural postulate, not a derived necessity; the result is therefore a conditional selector theorem."

## Machine

- url: /library-v2/LIB2-018/
- content_sha256: ea6b5b300fbaa7acdd1917b9a314adc328ca0604f72bca710e3c57656d1ff2a0
- candidate_ids: C2-003

## Freshness

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