Equivalence of rank-four intersection properties
Prove or disprove that the three intersection properties for oriented matroids are equivalent in rank four.
References
Are the three intersection properties equivalent for oriented matroids in rank $4$? This is shown in the matroid case and open in the oriented matroid case.
— Mutations and (Non-)Euclideaness in oriented matroids
(2501.12951 - Wilhelmi, 22 Jan 2025) in Concluding remarks, Section concluding remarks