Bijections on pattern avoiding inversion sequences and related objects
Combinatorics
2024-04-08 v1
Abstract
The number of inversion sequences avoiding two patterns and is known to be the same as the number of permutations avoiding three patterns , , and . This sequence also counts the number of Schr\"{o}der paths without triple descents, restricted bicolored Dyck paths, -avoiding inversion sequences, and weighted ordered trees. We provide bijections to integrate them together by introducing -paths. Moreover, we define three kinds of statistics for each of the objects and count the number of each object with respect to these statistics. We also discuss direct sums of each object.
Cite
@article{arxiv.2404.04091,
title = {Bijections on pattern avoiding inversion sequences and related objects},
author = {JiSun Huh and Sangwook Kim and Seunghyun Seo and Heesung Shin},
journal= {arXiv preprint arXiv:2404.04091},
year = {2024}
}
Comments
29 pages, 12 figures, 3 tables