Gröbner geometry of Schubert polynomials through ice

Z Hamaker, O Pechenik, A Weigandt - Advances in Mathematics, 2022 - Elsevier
The geometric naturality of Schubert polynomials and their combinatorial pipe dream
representations was established by Knutson and Miller (2005) via antidiagonal Gröbner …

Minimal equations for matrix Schubert varieties

S Gao, A Yong - Journal of Commutative Algebra, 2024 - projecteuclid.org
Let Matn× n be the space of n× n matrices over a field k; the coordinate ring is R= k [xij] 1≤ i,
j≤ n. Let GLn be the general linear group of invertible n× n matrices with a Borel subgroup B …

Radical generic initial ideals

A Conca, E De Negri, E Gorla - Vietnam Journal of Mathematics, 2022 - Springer
In this paper, we survey the theory of Cartwright–Sturmfels ideals. These are ℤ n-graded
ideals, whose multigraded generic initial ideal is radical. Cartwright–Sturmfels ideals have …

Geometric vertex decomposition and liaison

P Klein, J Rajchgot - Forum of Mathematics, Sigma, 2021 - cambridge.org
Geometric vertex decomposition and liaison are two frameworks that have been used to
produce similar results about similar families of algebraic varieties. In this paper, we …

[PDF][PDF] Fine multidegrees, universal Gröbner bases, and matrix Schubert varieties

D Huang, M Larson - arXiv preprint arXiv:2410.02135, 2024 - mattlarson2399.github.io
We give a criterion for a collection of polynomials to be a universal Gröbner basis for an
ideal in terms of the multidegree of the closure of the corresponding affine variety in (P1) N …

Geometric vertex decomposition and liaison for toric ideals of graphs

M Cummings, S Da Silva, J Rajchgot… - arXiv preprint arXiv …, 2022 - arxiv.org
The geometric vertex decomposability property for polynomial ideals is an ideal-theoretic
generalization of the vertex decomposability property for simplicial complexes. Indeed, a …

Zero-one dual characters of flagged Weyl modules

PL Guo, Z Lin, SCY Peng - arXiv preprint arXiv:2411.10933, 2024 - arxiv.org
We prove a criterion of when the dual character $\chi_ {D}(x) $ of the flagged Weyl module
associated to a diagram $ D $ in the grid $[n]\times [n] $ is zero-one, that is, the coefficients …

Castelnuovo-Mumford regularity and Schubert geometry

A Yong - arXiv preprint arXiv:2202.06362, 2022 - arxiv.org
We study the Castelnuovo-Mumford regularity of tangent cones of Schubert varieties.
Conjectures about this statistic are presented; these are proved for the covexillary case. This …

[PDF][PDF] Schubert geometry and combinatorics

A Woo, A Yong - arXiv preprint arXiv:2303.01436, 2023 - arxiv.org
arXiv:2303.01436v1 [math.AG] 2 Mar 2023 Page 1 arXiv:2303.01436v1 [math.AG] 2 Mar
2023 SCHUBERT GEOMETRY AND COMBINATORICS ALEXANDER WOO AND …

Back Stable K-Theory Schubert Calculus

T Lam, SJ Lee, M Shimozono - … Mathematics Research Notices, 2023 - academic.oup.com
We study the back stable-theory Schubert calculus of the infinite flag variety. We define back
stable (double) Grothendieck polynomials and double-Stanley functions and establish …