Intersecting systems of signed sets.
Borg, Peter (2007)
The Electronic Journal of Combinatorics [electronic only]
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Displaying similar documents to “Dualities in signed vector systems”
Intersecting systems of signed sets.
Oriented matroids today.
Ziegler, Günter M. (1996)
The Electronic Journal of Combinatorics [electronic only]
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Matroids and duality
D. A. Higgs (1969)
Colloquium Mathematicae
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Oriented matroids in terms of order functions.
Jaritz, Renate (1997)
Beiträge zur Algebra und Geometrie
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Parallel projection of matroid spheres
Cordovil, Raúl, Guedes de Oliveira, A., Moreira, M. Leonor (1988)
Portugaliae mathematica
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On the excluded minors for matroids of branch-width three.
Hliněný, Petr (2002)
The Electronic Journal of Combinatorics [electronic only]
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Two interesting oriented matroids.
Richter-Gebert, Jürgen (1996)
Documenta Mathematica
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Broken Circuits in Matroids-Dohmen’s Inductive Proof
Wojciech Kordecki, Anna Łyczkowska-Hanćkowiak (2013)
Discussiones Mathematicae Graph Theory
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Dohmen [4] gives a simple inductive proof of Whitney’s famous broken circuits theorem. We generalise his inductive proof to the case of matroids
Transversal and cotransversal matroids via their representations.
Ardila, Federico (2007)
The Electronic Journal of Combinatorics [electronic only]
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Forbidden-minor characterization for the class of cographic element splitting matroids
Kiran Dalvi, Y.M. Borse, M.M. Shikare (2011)
Discussiones Mathematicae Graph Theory
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In this paper, we prove that an element splitting operation by every pair of elements on a cographic matroid yields a cographic matroid if and only if it has no minor isomorphic to M(K₄).
Restricted separation of polyedra
Bourgin, D.G. (1952)
Portugaliae mathematica
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Multimatroids. II: Orthogonality, minors and connectivity.
Bouchet, André (1998)
The Electronic Journal of Combinatorics [electronic only]
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