Garsia--Remmel $q$-rook numbers are not always unimodal

Fuente: arXiv
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Autores principales: Lewis, Joel Brewster, Morales, Alejandro H.
Formato: Preprint
Publicado: 2024
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author Lewis, Joel Brewster
Morales, Alejandro H.
author_facet Lewis, Joel Brewster
Morales, Alejandro H.
contents We show by an explicit example that the Garsia--Remmel $q$-rook numbers of Ferrers boards do not all have unimodal sequences of coefficients. This resolves in the negative a question from 1986 by the aforementioned authors.
format Preprint
id arxiv_https___arxiv_org_abs_2410_19714
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle Garsia--Remmel $q$-rook numbers are not always unimodal
Lewis, Joel Brewster
Morales, Alejandro H.
Combinatorics
05A05, 05A30, 05A20, secondary 05E05, 05A17
We show by an explicit example that the Garsia--Remmel $q$-rook numbers of Ferrers boards do not all have unimodal sequences of coefficients. This resolves in the negative a question from 1986 by the aforementioned authors.
title Garsia--Remmel $q$-rook numbers are not always unimodal
topic Combinatorics
05A05, 05A30, 05A20, secondary 05E05, 05A17
url https://arxiv.org/abs/2410.19714