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arxiv: 1005.5586 · v3 · pith:Z7HWLRS3new · submitted 2010-05-31 · 🧮 math.CO

Generalized permutohedra, h-vector of cotransversal matroids and pure O-sequences

classification 🧮 math.CO
keywords cotransversalgeneralizedh-vectormatroidmatroidspermutohedrapurebases
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Stanley has conjectured that the h-vector of a matroid complex is a pure O-sequence. We will prove this for cotransversal matroids by using generalized permutohedra. We construct a bijection between lattice points inside a r-dimensional convex polytope and bases of a rank r transversal matroid.

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