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Yangian characters and classical \(\mathcal W\)-algebras. (English) Zbl 1329.17025

Kohnen, Winfried (ed.) et al., Conformal field theory, automorphic forms and related topics. CFT 2011, Heidelberg, Germany, September 19–23, 2011. Berlin: Springer (ISBN 978-3-662-43830-5/hbk; 978-3-662-43831-2/ebook). Contributions in Mathematical and Computational Sciences 8, 287-334 (2014).
Let \(\mathfrak{g}\) be a simple finite dimensional complex Lie algebra and \(\hat{\mathfrak{g}}\) the corresponding affine Lie algebra. An appropriate version of the Harish-Chandra homomorphism for \(\hat{\mathfrak{g}}\) induces an isomorphism between the Feigin-Frenkel center of the vertex algebra associated with a certain vacuum \(\hat{\mathfrak{g}}\)-module and the classical \(\mathcal{W}\)-algebra for the Langlands dual of \(\mathfrak{g}\).
Explicit generators of the Feigin-Frenkel center are known. In the paper under review, the authors describe the Harish-Chandra images of certain generators of these generators in types \(B\), \(C\) and \(D\). These images turn out to be elements of the \(\mathcal{W}\)-algebra written in terms of non-commutative analogues of the complete and elementary symmetric functions.
For the entire collection see [Zbl 1297.00041].

MSC:

17B67 Kac-Moody (super)algebras; extended affine Lie algebras; toroidal Lie algebras
17B68 Virasoro and related algebras
17B10 Representations of Lie algebras and Lie superalgebras, algebraic theory (weights)

References:

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