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Three results related to the half-plane property of matroids

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Kummer_2-ia6mdxcsbewc8.pdf
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2025

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Published

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Algebraic Combinatorics. Centre Mersenne. 2025, 8(1), S. 1-15. eISSN 2589-5486. Verfügbar unter: doi: 10.5802/alco.399

Zusammenfassung

We settle three problems from the literature on stable and real zero polynomials and their connection to matroid theory. We disprove the weak real zero amalgamation conjecture by Schweighofer and the second author. We disprove a conjecture by Brändén and D’León by finding a relaxation of a matroid with the weak half-plane property that does not have the weak half-plane property itself. Finally, we prove that every quaternionic unimodular matroid has the half-plane property which was conjectured by Pendavingh and van Zwam.

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Fachgebiet (DDC)
510 Mathematik

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matroids, half-plane property, real zero polynomials, hyperbolic polynomials

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ISO 690KUMMER, Mario, David SAWALL, 2025. Three results related to the half-plane property of matroids. In: Algebraic Combinatorics. Centre Mersenne. 2025, 8(1), S. 1-15. eISSN 2589-5486. Verfügbar unter: doi: 10.5802/alco.399
BibTex
@article{Kummer2025-03-03Three-73786,
  title={Three results related to the half-plane property of matroids},
  year={2025},
  doi={10.5802/alco.399},
  number={1},
  volume={8},
  journal={Algebraic Combinatorics},
  pages={1--15},
  author={Kummer, Mario and Sawall, David}
}
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