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arxiv: 1002.2357 · v2 · pith:66IXZ6CWnew · submitted 2010-02-11 · 🧮 math.CO

Modular elimination in matroids and oriented matroids

classification 🧮 math.CO
keywords matroidsaxiomseliminationmodularorientedaxiomatizationcircuitcircuits
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We introduce a new axiomatization of matroid theory that requires the elimination property only among modular pairs of circuits, and we present a cryptomorphic phrasing thereof in terms of Crapo's axioms for flats. This new point of view leads to a corresponding strengthening of the circuit axioms for oriented matroids.

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