The tree of life and other affine buildings.
The Tutte group of projective spaces.
The Tutte polynomial of a morphism of matroids I. Set-pointed matroids and matroid perspectives
We study the basic algebraic properties of a 3-variable Tutte polynomial the author has associated with a morphism of matroids, more precisely with a matroid strong map, or matroid perspective in the present paper, or, equivalently by the Factorization Theorem, with a matroid together with a distinguished subset of elements. Most algebraic properties of the usual 2-variable Tutte polynomial of a matroid generalize to the 3-variable polynomial. Among specific properties we show that the 3-variable...
The vanishing of the cohomology of the Orlik-Solomon algebras.
Topological Representation of Dual Pairs of Oriented Matroids.
Transversal and cotransversal matroids via their representations.
Transversal lattices.
Two analogues of a classical sequence.
Two Constructions of Oriented Matroids with Disconnected Extension Space.
Two interesting oriented matroids.
Über Morphismen halbmodularer Verbände.
Undirected strict gammoids
Une axiomatisation au premier ordre des arrangements de pseudodroites euclidiennes
Nous définissons une structure logique permettant de représenter les classes d’homéomorphismes des arrangements de pseudodroites du plan euclidien. Nous donnons une axiomatisation finie du premier ordre de la réalisabilité des arrangements de pseudodroites.
Uniform binary geometries.
Uniform Oriented Matroids Without the Isotopy Property.
Valuated matroids---a new look at the greedy algorithm.
Vapnik-Chervonenkis Dimension and (Pseudo-)Hyperplane Arrangements.
Weak-join of matriods
"What Is a Complex Matroid?"
When is a 0-1 knapsack a matroid?