Lluis Eriksson (2026). Sharp positivity orders for reduction maps on perfect-tensor codes. AIRR.SCIENCE, ARR-2026-0DHZ1VS2VR9K7T4M, v1. https://airr.science/papers/ARR-2026-0DHZ1VS2VR9K7T4M/versions/v1/ Research preprint; ARR-2026-0DHZ1VS2VR9K7T4M v1. Not peer reviewed by AIRR. Working paper; not admitted to the AIRR accepted collection.