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Is Canfield Right? On the Asymptotic Coefficients for the Maximum Antichain of Partitions and Related Counting Inequalities

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Abstract

This paper dates back to the asymptotic solutions of Rota’s problem on the size of maximum antichain in the set partition lattice by Canfield and Harper and others. The knowledge of asymptotic coefficients could pave the way to the asymptotic solutions of such problems as (maximal) antichain counting in partition lattices. In addition to our attempt to reduce uncertainty in the values of these coefficients, we provide some inequalities for the discrepancy between the number of antichains and maximal antichains in partition lattices and give alternative proof for the number of maximal antichains obtained by us recently and recorded in the Online Encyclopaedia of Integer Sequences (https://oeis.org/A358041).

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Notes

  1. 1.

    See also [4] for\(n<20\).

  2. 2.
  3. 3.
  4. 4.

    join- and meet-irreducible elements are also called supremum- and infimum-irreducible elements, respectively.

  5. 5.

    https://github.com/LarimUQO/lattice-miner.

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Acknowledgements

This study was implemented in the Basic Research Program’s framework at HSE University. This research was also supported in part through computational resources of HPC facilities at HSE University.

I would like to thank all the OEIS editors, especially Joerg Arndt, Michel Marcus, and N. J. A. Sloane. I also would like to thank anonymous reviewers and Jaume Baixeries for relevant suggestions, and Lev P. Shibasov and Valentina A. Goloubeva for the lasting flame of inspiration. Last but not least I would like to thank Zamira Ignatova for her care and patience.

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Authors and Affiliations

  1. National Research University Higher School of Economics, Moscow, Russia

    Dmitry I. Ignatov

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  1. Dmitry I. Ignatov

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Correspondence toDmitry I. Ignatov.

Editor information

Editors and Affiliations

  1. National Research University Higher School of Economics, Moscow, Russia

    Dmitry I. Ignatov

  2. Krasovskii Institute of Mathematics and Mechanics of Russian Academy of Sciences, Yekaterinburg, Russia

    Michael Khachay

  3. University of Oslo, Oslo, Norway

    Andrey Kutuzov

  4. American University of Armenia, Yerevan, Armenia

    Habet Madoyan

  5. Artificial Intelligence Research Institute, Moscow, Russia

    Ilya Makarov

  6. University of Hamburg, Hamburg, Germany

    Irina Nikishina

  7. Skolkovo Institute of Science and Technology, Moscow, Russia

    Alexander Panchenko

  8. Mohamed bin Zayed University of Artificial Intelligence, Abu Dhabi, United Arab Emirates

    Maxim Panov

  9. University of Florida, Gainesville, FL, USA

    Panos M. Pardalos

  10. National Research University Higher School of Economics, Nizhny Novgorod, Russia

    Andrey V. Savchenko

  11. Apptek, Aachen, Germany

    Evgenii Tsymbalov

  12. Kazan Federal University, Kazan, Russia

    Elena Tutubalina

  13. MTS AI, Moscow, Russia

    Sergey Zagoruyko

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Ignatov, D.I. (2024). Is Canfield Right? On the Asymptotic Coefficients for the Maximum Antichain of Partitions and Related Counting Inequalities. In: Ignatov, D.I.,et al. Analysis of Images, Social Networks and Texts. AIST 2023. Lecture Notes in Computer Science, vol 14486. Springer, Cham. https://doi.org/10.1007/978-3-031-54534-4_25

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