Cyclic sieving phenomena on parabolic classes of faces of the cluster complex
Abstract
The cyclic sieving phenomenon was introduced by Reiner, Stanton and White in 2004 as a generalization of Stembridge's phenomenon. In a paper from 2008, Eu and Fu studied many occurrences of this phenomenon on the faces of the generalized cluster complex with the action of the Fomin-Reading rotation in the classical types , , and . There was yet no known uniform -analogue of the -face numbers of these complexes. In a more recent paper from 2023, Douvropoulos and Josuat-Verg\`es provided a refinement of the enumeration of the faces of the generalized cluster complex using a uniform formula. For a parabolic subgroup of the associated Coxeter group , their formula factorises nicely under the assumption that acts as a reflection group on , which is very often the case. Using this condition, we provide a uniform refinement of these cyclic sieving phenomena using a -analogue of their main formula with a type by type proof based on the classification of finite irreducible Coxeter groups.
Cite
@article{arxiv.2603.28242,
title = {Cyclic sieving phenomena on parabolic classes of faces of the cluster complex},
author = {Lucas Pouillart},
journal= {arXiv preprint arXiv:2603.28242},
year = {2026}
}
Comments
34 pages