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The K-theory of the Flag Variety and the Fomin-Kirillov Quadratic Algebra

We propose a new approach to the multiplication of Schubert classes in the K-theory of the flag variety. This extends the work of Fomin and Kirillov in the cohomology case, and is based on the quadratic algebra defined by them. More precisely, we define K-theoretic versions of the Dunkl elements considered by Fomin and Kirillov, show that they commute, and use them to describe the structure constants of the K-theory of the flag variety with respect to its basis of Schubert classes.

preprint2004arXivOpen access
Cristian Lenart
math.COmath.AG
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Cristian Lenart

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