Hyperoctahedral species

Details Hyperoctahedral species Hyperoctahedral species

2008-10-22

arxiv.org/abs/0810.4089v1

S\'em. Lothar. Combin. 61A (2010), Art. B61Aj, 22 p

Mathematics

Combinatorics

Scientific paper

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.

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