INTERSECTION MULTIPLICITY ONE FOR CLASSICAL GROUPS
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In this note we show that when G is a classical semi-simple algebraic group, B ⊂ G a Borel subgroup, and X = G/B, then the structure coefficients of the Belkale–Kumar product ⨀0 on H*(X, Z) are all either 0 or 1.
KeywordsCohomology of homogeneous spaces roots and weights
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