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arXiv · 2105.11404

Infinite flags and Schubert polynomials

David Anderson
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Abstract

We study Schubert polynomials using geometry of infinite-dimensional flag varieties and degeneracy loci. Applications include Graham-positivity of coefficients appearing in equivariant coproduct formulas and expansions of back-stable and enriched Schubert polynomials. We also construct an embedding of the type C flag variety, and study the corresponding pullback map on (equivariant) cohomology rings.

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David Anderson. 2021-05-24. Infinite flags and Schubert polynomials. https://doi.org/10.1017/fms.2024.99

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