Multiplicative rule of Schubert classes
Haibao Duan
Abstract
Let G be a compact connected Lie group and H, the centralizer of a one-parameter subgroup in G. Combining the ideas of Bott-Samelson resulotions of Schubert varieties and the enumerative formula on a twisted products of 2-spheres obatained in Du2], we obtain a closed formula for multiplying Schubert classes in the flag manifold G/H.
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