European Journal of Combinatorics
Springer fibers are subvarieties of the flag variety parametrized by partitions; they are central objects of study in geometric representation theory. Schubert varieties are subvarieties of the flag variety that induce a well-known basis for the cohomology of the flag variety. This paper relates these two varieties combinatorially. We prove that the Betti numbers of the Springer fiber associated to a partition with at most three rows or two columns are equal to the Betti numbers of a specific union of Schubert varieties.
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Precup, Martha and Tymoczko, Julianna, "Springer Fibers and Schubert Points" (2019). Mathematics and Statistics: Faculty Publications, Smith College, Northampton, MA.