Lluis Eriksson (2026). Morse-Bott Spectral Reduction and the Yang-Mills Mass Gap on the Lattice. AIRR.SCIENCE, ARR-2026-00YSQD5FFQ8Y99ZZ, v1. https://airr.science/papers/ARR-2026-00YSQD5FFQ8Y99ZZ/versions/v1/ Archived manuscript; ARR-2026-00YSQD5FFQ8Y99ZZ v1. Not peer reviewed by AIRR. Historical import; not assessed by AIRR.