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Eulerian polynomials on segmented permutations

Combinatorics 2018-05-07 v1

Abstract

We define a generalization of the Eulerian polynomials and the Eulerian numbers by considering a descent statistic on segmented permutations coming from the study of 2-species exclusion processes and a change of basis in a Hopf algebra. We give some properties satisfied by these generalized Eulerian numbers. We also define a qq-analog of these Eulerian polynomials which gives back usual Eulerian polynomials and ordered Bell polynomials for specific values of its variables. We also define a noncommutative analog living in the algebra of segmented compositions. It gives us an explicit generating function and some identities satisfied by the generalized Eulerian polynomials such as a Worpitzky-type relation.

Keywords

Cite

@article{arxiv.1805.01797,
  title  = {Eulerian polynomials on segmented permutations},
  author = {Arthur Nunge},
  journal= {arXiv preprint arXiv:1805.01797},
  year   = {2018}
}

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12 pages