Established within the stated premises
Complete E6 orbital algebra with five irreducible components
finding:e8-cut-five-orbital-incidence-algebra-complete
The actual Weyl action is transitive on1120 E6 cuts. An explicit stabilizing E6/A2 reflection subgroup is transitive on each intersection class: D5 with81,D4 with270,A4 with648,A2+A2 with120 neighbours. Including equality these are the full five orbitals. All125 structure constants yield the commutative full commutant. Normalized primitive idempotents have ranks1,35,84,300,700, proving the complete irreducible Weyl decomposition.
Scope: Complete for regular A2-normal E6 root cuts in standard E8 under its actual Weyl action; not arbitrary Lie-subalgebra embeddings.
Required premises and original source excerpts
- Regular E8 cuts and full compiler flags
Fix the standard E8 roots with their actual Weyl action. E6 objects are complements of regular A2 root systems and E7 objects complements of root lines. A tetrahedron comprises the four A2 faces of a regular A3 normal system with common D5 core; its D8 incidence requires both factors. Relations are literal root inclusions and intersection sizes. Signals are rational, real or complex functions with counting inner product. Equivalence transports all flags by the Weyl action, without a selected corner or physical source.
premise:standard-e8-root-cut-full-flag-incidence-category
- experiments/theory-contracts/e-series-incidence-algebra-20261024/THEOREMS.txt, lines 57–89
Source SHA256: e80821d422297cfdfce23e892c1b099cc23505ae22ae92f01dcf77d4062f0a5d
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