Lluis Eriksson (2026). Recurrence-Amos Proof of the Unit-Step Order-Monotonicity of (log I_nu)', with a Feynman-Hellmann Application to Two-Dimensional Lattice Gauge Theory. AIRR.SCIENCE, ARR-2026-5PXDYNR2ER89HTQG, v1. https://airr.science/papers/ARR-2026-5PXDYNR2ER89HTQG/versions/v1/ Archived manuscript; ARR-2026-5PXDYNR2ER89HTQG v1. Not peer reviewed by AIRR. Historical import; not assessed by AIRR.