Resolutions of De Concini-Procesi ideals indexed by hook shapes.

   Mercedes Helena Rosas, (York University)

De Concini and Procesi studied a family of ideals, indexed by partitions in connection with their studies of some particular families of flag varieties. In this work we compute their resolutions, and give an explicit formula for their Poincare polynomial, when the ideals happen to be indexed by an hook shape.

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