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Non-simple polyominoes of Kőnig type and their canonical module

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2025

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Navarra, Francesco

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Journal of Algebra. Elsevier. 2025, 673, S. 351-384. ISSN 0021-8693. Verfügbar unter: doi: 10.1016/j.jalgebra.2025.02.034

Zusammenfassung

We study the Kőnig type property for non-simple polyominoes. We prove that, for closed path polyominoes, the polyomino ideals are of Konig type, extending the results of Herzog and Hibi for simple thin polyominoes. As an application of this result, we give a combinatorial interpretation for the canonical module of the coordinate ring of a sub-class of closed paths, namely circle closed path polyominoes. In this case, we compute also the Cohen-Macaulay type and we show that the coordinate ring is level.

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Fachgebiet (DDC)
510 Mathematik

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Polyominoes, Binomial ideals, Krull dimension, Canonical module

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ISO 690DINU, Rodica, Francesco NAVARRA, 2025. Non-simple polyominoes of Kőnig type and their canonical module. In: Journal of Algebra. Elsevier. 2025, 673, S. 351-384. ISSN 0021-8693. Verfügbar unter: doi: 10.1016/j.jalgebra.2025.02.034
BibTex
@article{Dinu2025-07Nonsi-72896,
  title={Non-simple polyominoes of Kőnig type and their canonical module},
  year={2025},
  doi={10.1016/j.jalgebra.2025.02.034},
  volume={673},
  issn={0021-8693},
  journal={Journal of Algebra},
  pages={351--384},
  author={Dinu, Rodica and Navarra, Francesco}
}
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