Equivariant K-Chevalley Rules for Kac-Moody Flag Manifolds

Details Equivariant K-Chevalley Rules for Kac-Moody Flag Manifolds Equivariant K-Chevalley Rules for Kac-Moody Flag Manifolds

2012-03-14

arxiv.org/abs/1203.3237v1

Mathematics

Combinatorics

Scientific paper

Explicit combinatorial cancellation-free rules are given for the product of an equivariant line bundle class with a Schubert class in the torus-equivariant K-theory of a Kac-Moody flag manifold. The weight of the line bundle may be dominant or antidominant, and the coefficients may be described either by Lakshmibai-Seshadri paths or by the alcove model of the first author and Postnikov. For Lakshmibai-Seshadri paths, our formulas are the Kac-Moody generalizations of results of Griffeth-Ram and Pittie-Ram for finite dimensional flag manifolds. A gap in the proofs of the mentioned results is addressed.

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