Homomesies on permutations: An analysis of maps and statistics in the FindStat database

Author:

Elder Jennifer,Lafrenière Nadia,McNicholas Erin,Striker Jessica,Welch Amanda

Abstract

In this paper, we perform a systematic study of permutation statistics and bijective maps on permutations in which we identify and prove 122 instances of the homomesy phenomenon. Homomesy occurs when the average value of a statistic is the same on each orbit of a given map. The maps we investigate include the Lehmer code rotation, the reverse, the complement, the Foata bijection, and the Kreweras complement. The statistics studied relate to familiar notions such as inversions, descents, and permutation patterns, and also more obscure constructs. Besides the many new homomesy results, we discuss our research method, in which we used SageMath to search the FindStat combinatorial statistics database to identify potential homomesies.

Funder

Simons Foundation

Publisher

American Mathematical Society (AMS)

Subject

Applied Mathematics,Computational Mathematics,Algebra and Number Theory

Reference26 articles.

1. The sorting order on a Coxeter group;Armstrong, Drew;J. Combin. Theory Ser. A,2009

2. Generalized permutation patterns and a classification of the Mahonian statistics;Babson, Eric;S\'{e}m. Lothar. Combin.,2000

3. Fingerprint databases for theorems;Billey, Sara C.;Notices Amer. Math. Soc.,2013

4. A central limit theorem for a new statistic on permutations;Chatterjee, Sourav;Indian J. Pure Appl. Math.,2017

5. New Euler-Mahonian statistics on permutations and words;Clarke, Robert J.;Adv. in Appl. Math.,1997

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3