The strict coefficient deficit outside cyclic arcs
Abstract
The strict coefficient deficit outside cyclic arcs
Theorem 1.1 (strict_coefficient_non_arc).
Proof. Machine-checked in Lean as D5/S3/Quantum/SpinChains/HKNNBlockBlochLargestWeight/ArcCoefficients.strict_coefficient_non_arc (✓ std3). ∎
Source. Repository-derived.
Commentary.
A balanced cyclic binary word outside the block orbit contains alternating down-up-down-up sites or the complementary pattern. The prescribed partner swap supplies opposite signs. Unbalanced configurations have zero coefficient, and K is positive.