Meaning of digraphoid | Babel Free

Definitions

A dual pair of regular matroids.

Examples

“We now wish⟳ to consider⟳ what part of the theory of directed graphs can be built up in the wider context of graphoids/matroids. To this end⟳, we shall introduce⟳ the concepts of digraphoid (short for “directed graphoid”) and orientable graphoid. […] A digraphoid is a structure⟳ consisting of: (1º) a graphoid, and (2º) a partitioning of each circuit and cocircuit of the graphoid, each being partitioned into two sets; this partitioning is to satisfy⟳ the axiom: […]”

CEFR level