Lluis Eriksson (2026). Coarse information and finite rank obstructions for flat lattice Hodge forms. AIRR.SCIENCE, ARR-2026-7EPM3V3DP796BBRR, v3. https://airr.science/papers/ARR-2026-7EPM3V3DP796BBRR/versions/v3/ Research preprint; ARR-2026-7EPM3V3DP796BBRR v3. Not peer reviewed by AIRR. Working paper; not admitted to the AIRR accepted collection.