Semantic Scholar Open Access 2008 22 sitasi

Combinatorics in affine flag varieties

J. Parkinson Arun Ram Christoph Schwer

Lihat Sumber DOI

Abstrak

Abstract The Littelmann path model gives a realization of the crystals of integrable representations of symmetrizable Kac–Moody Lie algebras. Recent work of Gaussent and Littelmann [S. Gaussent, P. Littelmann, LS galleries, the path model, and MV cycles, Duke Math. J. 127 (1) (2005) 35–88] and others [A. Braverman, D. Gaitsgory, Crystals via the affine Grassmannian, Duke Math. J. 107 (3) (2001) 561–575; S. Gaussent, G. Rousseau, Kac–Moody groups, hovels and Littelmann's paths, preprint, arXiv: math.GR/0703639 , 2007] has demonstrated a connection between this model and the geometry of the loop Grassmanian. The alcove walk model is a version of the path model which is intimately connected to the combinatorics of the affine Hecke algebra. In this paper we define a refined alcove walk model which encodes the points of the affine flag variety. We show that this combinatorial indexing naturally indexes the cells in generalized Mirkovic–Vilonen intersections.

Topik & Kata Kunci

Mathematics

Penulis (3)

J. Parkinson

Arun Ram

Christoph Schwer

Format Sitasi

APA MLA BibTeX

Parkinson, J., Ram, A., Schwer, C. (2008). Combinatorics in affine flag varieties. https://doi.org/10.1016/J.JALGEBRA.2008.04.015

Akses Cepat

Lihat di Sumber doi.org/10.1016/J.JALGEBRA.2008.04.015

Informasi Jurnal

Tahun Terbit: 2008
Bahasa: en
Total Sitasi: 22×
Sumber Database: Semantic Scholar
DOI: 10.1016/J.JALGEBRA.2008.04.015
Akses: Open Access ✓