Lluis Eriksson (2026). Interface Lemmas for the Multiscale Proof of the Lattice Yang-Mills Mass Gap. AIRR.SCIENCE, ARR-2026-2695DMHYEK9NEBXD, v1. https://airr.science/papers/ARR-2026-2695DMHYEK9NEBXD/versions/v1/ Archived manuscript; ARR-2026-2695DMHYEK9NEBXD v1. Not peer reviewed by AIRR. Historical import; not assessed by AIRR.