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Parameters in Inversion Sequences

  • Margaret Archibald EMAIL logo , Aubrey Blecher und Arnold Knopfmacher
Veröffentlicht/Copyright: 15. Juni 2023
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ABSTRACT

We study various combinatorial parameters in the set of inversion sequences of length n. First, we provide generating functions for 1-successions and then generalise this to p-successions. Thereafter we find the formulae for the total number of successions by extracting coefficients. We then do the same for runs of length r and the length of the ith run. Next, we derive a generating function for the number of inversions in inversion sequences themselves and show that inversion sequences with no inversions are counted by the Catalan numbers. Finally, viewing inversion sequences as bargraphs, we develop a generating function for their area.

2020 Mathematics Subject Classification: Primary 05A05; Secondary 05A15

(Communicated by Anatolij Dvurečenskij)


REFERENCES

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Received: 2021-12-06
Accepted: 2022-08-24
Published Online: 2023-06-15

© 2023 Mathematical Institute Slovak Academy of Sciences

Artikel in diesem Heft

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  3. A Note on Cuts of Lattice-Valued Functions and Concept Lattices
  4. Trigonometric Sums and Riemann Zeta Function
  5. Notes on the Equation d(n) = d(φ(n)) and Related Inequalities
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Heruntergeladen am 15.12.2025 von https://www.degruyterbrill.com/document/doi/10.1515/ms-2023-0041/pdf
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