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math.RA2017
Formal affine Demazure and Hecke algebras of Kac-Moody root systems
Baptiste Calmès, Kirill Zainoulline, Changlong Zhong
We define the formal affine Demazure algebra and formal affine Hecke algebra associated to a Kac-Moody root system. We prove the structure theorems of these algebras, hence, extend…
math.RA2012★ 26 cited
A coproduct structure on the formal affine Demazure algebra
Baptiste Calmès, Kirill Zainoulline, Changlong Zhong
In the present paper we generalize the coproduct structure on nil Hecke rings introduced and studied by Kostant-Kumar to the context of an arbitrary algebraic oriented cohomology t…