Andersen Filtration and Hard Lefschetz
Wolfgang Soergel
Abstract
On the space of homomorphisms from a Verma module to an indecomposable tilting module of the BGG-category O we define a natural filtration following Andersen and establish a formula expressing the dimensions of the filtration steps in terms of coefficients of Kazhdan-Lusztig polynomials.
Create a lesson
Related papers
Noncommutative Cluster Varieties and Moduli Spaces of Local Systems
Zachary Greenberg, Dani Kaufman, Merik Niemeyer et al.
The Saito determinant for extended affine Weyl discriminant strata
Andrea Brini, Karoline van Gemst
Unitary Shimura Correspondence for Complex Classical Groups
Wan-Yu Tsai, Kayue Daniel Wong, Hongfeng Zhang
An enhanced Helgason-Johnson bound for Sp(p, q)
Zhan Ying, Chao-Ping Dong
Auslander-Reiten (n+2)-angles and local finiteness
Jian He, Yu-Zhe Liu, Panyue Zhou
A σ-McKay theorem for π-separable groups
David Cabrera-Berenguer