On the Excluded Minors for Quaternary Ma
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J.F. Geelen; J.G. Oxley; D.L. Vertigan; G.P. Whittle
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Article
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2000
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Elsevier Science
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English
โ 221 KB
This paper strengthens the excluded-minor characterization of GF(4)-representable matroids. In particular, it is shown that there are only finitely many 3-connected matroids that are not GF(4)-representable and that have no U 2, 6 -, U 4, 6 -, P 6 -, F & 7 -, or (F & 7 )\*-minors. Explicitly, these