Ternary
A matroid is ternary if it is representable over $\mathbb F_3 = GF(3)$. Its excluded minors are $U_{2,5}$, $U_{3,5}$, the Fano plane $F_7$ and its dual $F_7^*$. Copied from polyDB (TERNARY).
A matroid is ternary if it is representable over $\mathbb F_3 = GF(3)$. Its excluded minors are $U_{2,5}$, $U_{3,5}$, the Fano plane $F_7$ and its dual $F_7^*$. Copied from polyDB (TERNARY).