Inversion polynomials for 321-avoiding permutations: addendum
Combinatorics
2013-05-17 v1
Abstract
This addendum contains results about the inversion number and major index polynomials for permutations avoiding 321 which did not fit well into the original paper. In particular, we consider symmetry, unimodality, behavior modulo 2, and signed enumeration.
Keywords
Cite
@article{arxiv.1305.3845,
title = {Inversion polynomials for 321-avoiding permutations: addendum},
author = {Szu-En Cheng and Sergi Elizalde and Anisse Kasraoui and Bruce E. Sagan},
journal= {arXiv preprint arXiv:1305.3845},
year = {2013}
}
Comments
8 pages, 1 figure. arXiv admin note: text overlap with arXiv:1112.6014