Stanley symmetric functions and quiver varieties

Details Stanley symmetric functions and quiver varieties Stanley symmetric functions and quiver varieties

1999-09-16

arxiv.org/abs/math/9909090v1

Mathematics

Combinatorics

13 pages, 11 figures

Scientific paper

In our joint paper with W. Fulton (math.AG/9804041) we prove a formula for the cohomology class of a quiver variety. This formula is general enough to give new expressions for all known types of Schubert polynomials. In the present paper we discuss the relationship between this formula and Stanley symmetric functions. We show that the coefficients obtained when a Stanley symmetric function is expressed in the basis of Schur functions are special cases of a class of generalized Littlewood-Richardson coefficients appearing in the formula for quiver varieties. We also prove that Fulton's universal Schubert polynomials (math.AG/9702012) satisfy the usual rule for a Schubert polynomial of a product of two permutations.

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