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A geometric realization of Catalan functions
We construct smooth projective varieties $\sX_Ψ$, each of which compactifies an equivariant vector subbundle of the cotangent bundle of the flag variety for $\GL(n)$. Each variety $\sX_Ψ$ carries a natural family of line bundles whose spaces of global sections realize, as graded characters, the Cata
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