3 papers
math.CO2026
Palindromic Poincaré polynomials in Type
Gaston Burrull
We completely describe the set of all palindromic Poincaré polynomials in type . Additionally, we show that all lower Bruhat intervals in type occur in type . As a…
math.CO2025
Shape and class of Bruhat Intervals
Gaston Burrull, Nicolas Libedinsky, Rodrigo Villegas
We study Bruhat intervals in affine Weyl groups by viewing them as regions of alcoves. In type we show that each interval coincides with a generalized permutohedr…
math.RT2019
-Jones-Wenzl idempotents
Gaston Burrull, Nicolas Libedinsky, Paolo Sentinelli
For a prime number and any natural number we introduce, by giving an explicit recursive formula, the -Jones-Wenzl projector , an element of the…