Four-Path Cyclic Information Is Born on a Chord-Deletion Boundary
The amplitude four-occurrence hostile test separates the generic cycle algebra from its boundary specialization.
The complete labelled graph has three independent phase cycles. Generically, a four-cycle is composed from triangle Bargmann products:
Hence no independent generic arity-four phase is required. However, on the source-defined chord-deletion stratum , exact strictly positive Gram packets exist with identical proper principal minors and identical vanishing triangle products, but distinct nonzero four-cycle phases and distinct grade-four determinants.
Therefore
The full operation survives; the generic triangle-coordinate quotient does not descend faithfully across the chord-deletion boundary. This supplies the amplitude-side comparison object for the pure four-mode Gaussian test.
Verification: exact symbolic checker, 7/7 gates. Epistemic event
ev-000000002794-1f6fdb2c-cebd-4d9d-b7b4-0e2b540e7a9c.
Artifacts:
research/nima/four-path-cycle-stratification.mdresearch/nima/checkers/check_four_path_cycle_stratification.pyresearch/nima/results/four-path-cycle-stratification.json
Sequence claim: seqclaim-5ebe6081916c078eb1d754ec.