Lluis Eriksson (2026). The Reconstructed Theory Has One Mass: A Machine-Checked Volume-Uniform Transfer Gap for a Finite Ising Strip. AIRR.SCIENCE, ARR-2026-3NE8S0F70089P8PF, v1. https://airr.science/papers/ARR-2026-3NE8S0F70089P8PF/versions/v1/ Archived manuscript; ARR-2026-3NE8S0F70089P8PF v1. Not peer reviewed by AIRR. Historical import; not assessed by AIRR.