On lower Bruhat Intervals in affine Weyl groups

Organisé par

Institut Henri Poincaré

The Bruhat order on a Weyl group arises naturally from geometry, through inclusion relations among Schubert varieties, but it can also be defined combinatorially in the broader context of Coxeter systems. It is of major importance in Kazhdan-Lusztig theory, serving to define the remarkable Kazhdan-Lusztig basis and polynomials. Many fundamental questions about this partial order remain open; for i

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