Andersen Filtration and Hard Lefschetz

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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.
English version of math.RT/0604589, v3 revised translation

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Representation Theory, 22E47

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http://salesiana.dossiersoluciones.com/handle/123456789/223565

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0604590
 http://arxiv.org/abs/math/0604590
 GAFA, Vol. 17 (2007) 2066-2089
 doi:10.1007/s00039-007-0640-9

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arXiv