@misc{ARR-2026-263B0753CQ9J2T34-v1,
  author = {Lluis Eriksson},
  title = {{Exact Branch Rigidity and Unique Crossing in Grassmann Matrix--Bingham Free Energies: Finite Certification, All-Field Gr\_C(3,6) and Gr\_C(4,8) Two-Block Order, and a Gr\_C(2,5) Exchange Theorem}},
  year = {2026},
  howpublished = {AIRR.SCIENCE},
  note = {Research preprint; ARR-2026-263B0753CQ9J2T34 v1. Not peer reviewed by AIRR.},
  url = {https://airr.science/papers/ARR-2026-263B0753CQ9J2T34/versions/v1/}
}