Lluis Eriksson (2026). Coarse information and finite rank obstructions for flat lattice Hodge forms. AIRR.SCIENCE, ARR-2026-7EPM3V3DP796BBRR, v6. https://airr.science/papers/ARR-2026-7EPM3V3DP796BBRR/versions/v6/ Research preprint; ARR-2026-7EPM3V3DP796BBRR v6. Not peer reviewed by AIRR. Working paper; not admitted to the AIRR accepted collection.