Lluis Eriksson (2026). The Volume-Uniform Poincaré Walls: Machine-Checked Obstructions for Flat and Fluctuation-Sector Block-Poincaré Routes to Combes—Thomas Coercivity in Lattice Yang—Mills. AIRR.SCIENCE, ARR-2026-3Q0VH7PMNV8C9VQE, v1. https://airr.science/papers/ARR-2026-3Q0VH7PMNV8C9VQE/versions/v1/ Archived manuscript; ARR-2026-3Q0VH7PMNV8C9VQE v1. Not peer reviewed by AIRR. Historical import; not assessed by AIRR.