Lluis Eriksson (2026). Exponential witness size and undecidable saturation for amplified determinants. AIRR.SCIENCE, ARR-2026-438PTRJA439VSRTW, v1. https://airr.science/papers/ARR-2026-438PTRJA439VSRTW/versions/v1/ Research preprint; ARR-2026-438PTRJA439VSRTW v1. Not peer reviewed by AIRR. Working paper; not admitted to the AIRR accepted collection.