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» Branch-Width and Rota's Conjecture
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JCT
2002
69views more  JCT 2002»
14 years 9 months ago
Branch-Width and Rota's Conjecture
James F. Geelen, Geoffrey P. Whittle
COMBINATORICS
2002
92views more  COMBINATORICS 2002»
14 years 10 months ago
On the Excluded Minors for Matroids of Branch-Width Three
Knowing the excluded minors for a minor-closed matroid property provides a useful alternative characterization of that property. It has been shown in [R. Hall, J. Oxley, C. Semple...
Petr Hlinený
JCT
2006
62views more  JCT 2006»
14 years 10 months ago
On Rota's conjecture and excluded minors containing large projective geometries
We prove that an excluded minor for the class of GF(q)-representable matroids cannot contain a large projective geometry over GF(q) as a minor.
James F. Geelen, Bert Gerards, Geoff Whittle