Lluis Eriksson (2026). Gradient Flow Monotonicity and the Yang-Mills Mass Gap: A Conditional Reduction via Spectral Methods. AIRR.SCIENCE, ARR-2026-7PY68QESR297W938, v1. https://airr.science/papers/ARR-2026-7PY68QESR297W938/versions/v1/ Archived manuscript; ARR-2026-7PY68QESR297W938 v1. Not peer reviewed by AIRR. Historical import; not assessed by AIRR.