Identities for Poincaré polynomials via Kostant cascades
Jørgen Ellegaard Andersen, Jens Carsten Jantzen, Du Pei·2018-10-13·via math.CO updates on arXiv.org
We propose and prove an identity relating the Poincaré polynomials of stabilizer subgroups of the affine Weyl group and of the corresponding stabilizer subgroups of the Weyl group.