English

Equipopularity Classes in the Separable Permutations

Combinatorics 2014-10-28 v1

Abstract

When two patterns occur equally often in a set of permutations, we say that these patterns are equipopular. Using both structural and analytic tools, we classify the equipopular patterns in the set of separable permutations. In particular, we show that the number of equipopularity classes for length nn patterns in the separable permutations is equal to the number of partitions of n1n-1.

Keywords

Cite

@article{arxiv.1410.7312,
  title  = {Equipopularity Classes in the Separable Permutations},
  author = {Michael Albert and Cheyne Homberger and Jay Pantone},
  journal= {arXiv preprint arXiv:1410.7312},
  year   = {2014}
}
R2 v1 2026-06-22T06:37:29.196Z