Scope
Chapter “The admissibility frontier”, section “the mixed interface has an exact shape”. This is assertion 2 of 4 in that section.
Expanded claim page · assertion 2 of 4
Follows from declared assumptions and has an inspectable certificate. joins several typed results while letting the weakest edge set the claim.
Exact assertion
With the equal-weight vertex pairing the interface is positive definite, has determinant nine and discriminant group \(\mathbb Z_9\). It carries a natural permutation-invariant cubic, but the product obtained by projecting coordinate multiplication back to the zero-sum space is not Jordan. The result is therefore a definite transfer lattice, not an octonion, Leech, \(E_6\) or \(E_8\) identification and not a physical A8 symmetry.
The stated conclusion follows inside the declared model. Reusing it elsewhere requires carrying the same object definitions, assumptions and typing.
Chapter “The admissibility frontier”, section “the mixed interface has an exact shape”. This is assertion 2 of 4 in that section.
Audit the declared carrier, assumptions and certificate. The result is exact only within that written scope.
joins several typed results while letting the weakest edge set the claim.
Locate a mismatched definition, an omitted assumption, a failed certificate step or a counterexample on the declared carrier.
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