Zobrazeno 1 - 10
of 33
pro vyhledávání: '"le diagram"'
Publikováno v:
In Chaos, Solitons and Fractals: the interdisciplinary journal of Nonlinear Science, and Nonequilibrium and Complex Phenomena April 2024 181
Autor:
Ford, Nicolas, Serhiyenko, Khrystyna
Publikováno v:
In Journal of Combinatorial Theory, Series A October 2018 159:164-182
Autor:
Chavez, Anastasia, Gotti, Felix ⁎
Publikováno v:
In Journal of Combinatorial Theory, Series A February 2018 154:507-532
Autor:
Lewis, Joel Brewster a, 1, Morales, Alejandro H. b, 2
Publikováno v:
In Journal of Combinatorial Theory, Series A January 2016 137:273-306
Autor:
Talaska, Kelli 1
Publikováno v:
In Journal of Combinatorial Theory, Series A 2011 118(1):58-66
Akademický článek
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Autor:
Joel Brewster Lewis, Alejandro Morales
Publikováno v:
Discrete Mathematics & Theoretical Computer Science, Vol DMTCS Proceedings vol. AT,..., Iss Proceedings (2014)
There are numerous combinatorial objects associated to a Grassmannian permutation $w_λ$ that index cells of the totally nonnegative Grassmannian. We study some of these objects (rook placements, acyclic orientations, various restricted fillings) and
Externí odkaz:
https://doaj.org/article/9383776dd0094ae6ba7cb34ac7aa17cf
Autor:
Kelli Talaska
Publikováno v:
Discrete Mathematics & Theoretical Computer Science, Vol DMTCS Proceedings vol. AK,..., Iss Proceedings (2009)
Postnikov constructed a decomposition of a totally nonnegative Grassmannian $(Gr _{kn})_≥0$ into positroid cells. We provide combinatorial formulas that allow one to decide which cell a given point in $(Gr _{kn})_≥0$ belongs to and to determine a
Externí odkaz:
https://doaj.org/article/0c39c814c2ea46b9bcec36e345cefed3
Autor:
Alexey Spiridonov
Publikováno v:
Discrete Mathematics & Theoretical Computer Science, Vol DMTCS Proceedings vol. AJ,..., Iss Proceedings (2008)
A $\textit{grid shape}$ is a set of boxes chosen from a square grid; any Young diagram is an example. This paper considers a notion of pattern-avoidance for $0-1$ fillings of grid shapes, which generalizes permutation pattern-avoidance. A filling avo
Externí odkaz:
https://doaj.org/article/18e2503823ab42a1aa99aac7c1f27a8c