Hyperoctahedral species
Combinatorics
2010-10-05 v1
Abstract
We introduce a new definition for the species of type B, or H-species, analog to the classical species (of type A), but on which we consider the action of the groups Bn of signed permutations. We are interested in algebraic structure on these H-species and give examples of Hopf monoids. The natural way to get a graded vector space from a species, given in this paper in terms of functors, will allow us to deepen our understanding of these species. In particular, the image of the classical species of set compositions under a given functor is isomorphic to the combinatorial Hopf algebra DQSym.
Cite
@article{arxiv.0810.4089,
title = {Hyperoctahedral species},
author = {Nantel Bergeron and Philippe Choquette},
journal= {arXiv preprint arXiv:0810.4089},
year = {2010}
}