Twisted Verma modules
Quantum Algebra
2007-06-13 v1 Algebraic Geometry
Abstract
Using principal series Harish-Chandra modules, local cohomology with support in Schubert cells and twisting functors we construct certain modules parametrized by the Weyl group and a highest weight in the subcategory O of the category of representations of a complex semisimple Lie algebra. These are in a sense modules between a Verma module and its dual. We prove that the three different approaches lead to the same modules. Moreover, we demonstrate that they possess natural Jantzen type filtrations with corresponding sum formulae.
Cite
@article{arxiv.math/0105012,
title = {Twisted Verma modules},
author = {Henning Haahr Andersen and Niels Lauritzen},
journal= {arXiv preprint arXiv:math/0105012},
year = {2007}
}