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- Aba Mbirika
- Electr. J. Comb.
- 2010

The Springer variety is the set of flags stabilized by a nilpotent operator. In 1976, T.A. Springer observed that this variety’s cohomology ring carries a symmetric group action, and he offered a deep geometric construction of this action. Sixteen years later, Garsia and Procesi made Springer’s work more transparent and accessible by presenting the… (More)

- Aba Mbirika
- 2014

The Springer variety SX is defined to be the set of flags stabilized by a nilpotent operator X. Springer varieties can be generalized to a two-parameter family of varieties called Hessenberg varieties H(X, h), defined by a nilpotent operator X and a certain step function h (or equivalently, a Dyck path). In 1992, Garsia-Procesi gave a presentation of the… (More)

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