2 papers
math.CO2007
Affine descents and the Steinberg torus
Kevin Dilks, T. Kyle Petersen, John Stembridge
Let be an irreducible affine Weyl group with Coxeter complex , where denotes the associated finite Weyl group and the translation subgroup. The Steinberg to…
math.RT2007
Special isogenies and tensor product multiplicities
Shrawan Kumar, John R. Stembridge
We show that any bijection between two root systems that preserves angles (but not necessarily lengths) gives rise to inequalities relating tensor product multiplicities for the co…