Degeneracy Loci, Pfaffians, and Vexillary Signed Permutations in Types B, C, and D
Algebraic Geometry
2012-10-09 v1 Combinatorics
Abstract
We define a notion of vexillary signed permutation in types B, C, and D, corresponding to natural degeneracy loci for vector bundles with symmetries of those types. We show that the classes of these loci are given by explicit Pfaffian formulas. The Grassmannian formulas of Kazarian are important special cases, and the corresponding double Schubert polynomials of Ikeda, Mihalcea, and Naruse are shown to be equal to these Pfaffians.
Keywords
Cite
@article{arxiv.1210.2066,
title = {Degeneracy Loci, Pfaffians, and Vexillary Signed Permutations in Types B, C, and D},
author = {David Anderson and William Fulton},
journal= {arXiv preprint arXiv:1210.2066},
year = {2012}
}
Comments
36 pages