# LIB2-297 — Retired compact-colour subgroup claim in the split-G2 real form

- 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 archived branching prompt presented compact colour as a maximal subgroup of the split-G2 real form.

## Caution

The obstruction concerns the named split real form and does not exclude compact colour on a separately chosen carrier or real form.

## Primary source

Appendix N, Part N.B, Proposition 2.1: compact-colour obstruction, PDF p.266: "The compact colour algebra su(3) (dimension 8) cannot embed in the compact part available to the loaded subimage, whose maximal compact dimension is 6 < 8."

## Machine

- url: /library-v2/LIB2-297/
- content_sha256: a197f5bb12edf847701e2baceb03e6bf86078ba15559cd4f85fd43509c1d2165
- candidate_ids: C2-038

## Freshness

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