Type: Article
Publication Date: 2011-01-01
Citations: 66
DOI: https://doi.org/10.1093/imrn/rnr014
We study the PBW filtration on the highest weight representations V (λ) of . This filtration is induced by the standard degree filtration on . We give a description of the associated graded -module gr V (λ) in terms of generators and relations. We also construct a basis of gr V (λ). As an application we derive a graded combinatorial formula for the character of V (λ) and obtain a new class of bases of the modules V (λ).