The Queue-Number of Posets of Bounded Width or Height

  • Kolja KnauerEmail author
  • Piotr Micek
  • Torsten Ueckerdt
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11282)


Heath and Pemmaraju [9] conjectured that the queue-number of a poset is bounded by its width and if the poset is planar then also by its height. We show that there are planar posets whose queue-number is larger than their height, refuting the second conjecture. On the other hand, we show that any poset of width 2 has queue-number at most 2, thus confirming the first conjecture in the first non-trivial case. Moreover, we improve the previously best known bounds and show that planar posets of width w have queue-number at most \(3w-2\) while any planar poset with 0 and 1 has queue-number at most its width.


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© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Aix Marseille Univ, Université de Toulon, CNRS, LISMarseilleFrance
  2. 2.Faculty of Mathematics and Computer Science, Theoretical Computer Science DepartmentJagiellonian UniversityKrakówPoland
  3. 3.Karlsruhe Institute of Technology (KIT), Institute of Theoretical InformaticsKarlsruheGermany

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