Quaternary
A matroid is quaternary if it is representable over the field $\mathbb F_4 = GF(4)$ with four elements. Binary matroids are quaternary, and quaternary matroids are realizable. Computed from the matroid (not a polyDB property).
A matroid is quaternary if it is representable over the field $\mathbb F_4 = GF(4)$ with four elements. Binary matroids are quaternary, and quaternary matroids are realizable. Computed from the matroid (not a polyDB property).