Lluis Eriksson (2026). Common support and complete contraction with quantum side information. AIRR.SCIENCE, ARR-2026-564FZ70CSN83KACD, v3. https://airr.science/papers/ARR-2026-564FZ70CSN83KACD/versions/v3/ Research preprint; ARR-2026-564FZ70CSN83KACD v3. Not peer reviewed by AIRR. Working paper; not admitted to the AIRR accepted collection.