Analogue Zhelobenko Invariants and the Kostant Clifford Algebra Conjecture

Details Analogue Zhelobenko Invariants and the Kostant Clifford Algebra Conjecture Analogue Zhelobenko Invariants and the Kostant Clifford Algebra Conjecture

2011-11-15

arxiv.org/abs/1111.3508v1

Mathematics

Representation Theory

9 pages

Scientific paper

Let g be a complex simple Lie algebra and h a Cartan subalgebra. The Clifford algebra C(g) of g admits a Harish-Chandra map. Kostant conjectured (as communicated to Bazlov in about 1997) that the value of this map on a (suitably chosen) fundamental invariant of degree 2m+1 is just the zero weight vector of the simple 2m+1-dimensional module of the principal s-triple obtained from the Langlands dual of g. Bazlov settled this conjecture positively in type A. The Kostant conjecture was reformulated (Alekseev-Bazlov-Rohr) in terms of the Harish-Chandra map for the enveloping algebra U(g) composed with evaluation at the half sum of the positive roots. In an earlier work we settled an analogue of the Kostant conjecture obtained by replacing the Harish-Chandra map by a "generalized Harish-Chandra" map whose image is described via Zhelobenko invariants. Here we show that there are analogue Zhelobenko invariants which describe the image of the Harish-Chandra map. Following this a similar proof goes through.

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