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Combinatorial generation via permutation languages. II. Lattice congruences
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Hoang, Hung P. and Mutze, Torsten (2021) Combinatorial generation via permutation languages. II. Lattice congruences. Israel Journal of Mathematics . doi:10.1007/s11856-021-2186-1 (In Press)
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WRAP-Combinatorial-generation-via-permutation-languages-II-Lattice-congruences-Mutze-2020.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only until 21 August 2022. Contact author directly, specifying your specific needs. - Requires a PDF viewer. Download (2003Kb) |
Official URL: https://doi.org/10.1007/s11856-021-2186-1
Abstract
This paper deals with lattice congruences of the weak order on the symmetric group, and initiates the investigation of the cover graphs of the corresponding lattice quotients. These graphs also arise as the skeleta of the so-called quotientopes, a family of polytopes recently introduced by Pilaud and Santos [Bull. Lond. Math. Soc., 51:406–420, 2019], which generalize permutahedra, associahedra, hypercubes and several other polytopes. We prove that all of these graphs have a Hamilton path, which can be computed by a simple greedy algorithm. This is an application of our framework for exhaustively generating various classes of combinatorial objects by encoding them as permutations. We also characterize which of these graphs are vertex-transitive or regular via their arc diagrams, give corresponding precise and asymptotic counting results, and we determine their minimum and maximum degrees.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QA Mathematics Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software |
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| Divisions: | Faculty of Science > Computer Science | |||||||||
| Library of Congress Subject Headings (LCSH): | Congruence lattices , Symmetry groups , Computer science -- Mathematics, Polytopes , Permutations | |||||||||
| Journal or Publication Title: | Israel Journal of Mathematics | |||||||||
| Publisher: | Springer | |||||||||
| ISSN: | 0021-2172 | |||||||||
| Official Date: | 21 August 2021 | |||||||||
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| DOI: | 10.1007/s11856-021-2186-1 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | In Press | |||||||||
| Publisher Statement: | This is a post-peer-review, pre-copyedit version of an article published in Israel Journal of Mathematics. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11856-021-2186-1 | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
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