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Conference Papers Discrete Mathematics and Theoretical Computer Science Year : 2020

The topology of the external activity complex of a matroid

Abstract

We prove that the external activity complex Act<(M) of a matroid is shellable. In fact, we show that every linear extension of Las Vergnas's external/internal order
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Dates and versions

hal-02173754 , version 1 (04-07-2019)

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Federico Ardila, Federico Castillo, Jose Alejandro Samper. The topology of the external activity complex of a matroid. 28-th International Conference on Formal Power Series and Algebraic Combinatorics, Simon Fraser University, Jul 2016, Vancouver, Canada. ⟨10.46298/dmtcs.6355⟩. ⟨hal-02173754⟩
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