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We construct a vertex model whose partition function is a refined dual Grothendieck polynomial, where the states are interpreted as nonintersecting lattice paths. Using this, we show refined dual Grothendieck polynomials are multi-Schur…

Combinatorics · Mathematics 2021-01-01 Kohei Motegi , Travis Scrimshaw

In this paper, we study Grothendieck polynomials from a combinatorial viewpoint. We introduce the factorial Grothendieck polynomials, analogues of the factorial Schur functions and present some of their properties, and use them to produce a…

Combinatorics · Mathematics 2010-12-14 Peter J. McNamara

We prove a formula for the degrees of Ikeda and Naruse's $P$-Grothendieck polynomials using combinatorics of shifted tableaux. We show this formula can be used in conjunction with results of Hamaker, Marberg, and Pawlowski to obtain an…

Combinatorics · Mathematics 2024-06-24 Oliver Pechenik , Matthew St. Denis

Rado's theorem about permutahedra and dominance order on partitions reveals that each Schur polynomial is M-convex, or equivalently, it has a saturated Newton polytope and this polytope is a generalized permutahedron as well. In this paper…

Combinatorics · Mathematics 2024-01-29 Bo Wang , Candice X. T. Zhang , Zhong-Xue Zhang

We study the equivariant K-group of the affine flag manifold with respect to the Borel group action. We prove that the structure sheaf of the (infinite-dimensional) Schubert variety in the K-group is represented by a unique polynomial,…

Algebraic Geometry · Mathematics 2019-12-19 Masaki Kashiwara , Mark Shimozono

We give a presentation of refined (dual) canonical Grothendieck polynomials and their skew versions using free-fermions. Using this, we derive a number of identities, including the skew Cauchy identities, branching rules, expansion…

Combinatorics · Mathematics 2023-11-03 Shinsuke Iwao , Kohei Motegi , Travis Scrimshaw

The dual stable Grothendieck polynomials $g_\lambda$ and their sums $\sum_{\mu\subset\lambda} g_\mu$ (which represent $K$-homology classes of boundary ideal sheaves and structure sheaves of Schubert varieties in the Grassmannians) have the…

Combinatorics · Mathematics 2018-08-08 Motoki Takigiku

We study Schur Q-polynomials evaluated on a geometric progression, or equivalently q-enumeration of marked shifted tableaux, seeking explicit formulas that remain regular at q=1. We obtain several such expressions as multiple basic…

Combinatorics · Mathematics 2008-04-08 Hjalmar Rosengren

We prove an explicit combinatorial formula for the structure constants of the Grothendieck ring of a Grassmann variety with respect to its basis of Schubert structure sheaves. We furthermore relate K-theory of Grassmannians to a bialgebra…

Algebraic Geometry · Mathematics 2007-05-23 Anders Skovsted Buch

Let $G$ be a split semisimple linear algebraic group over a field and let $X$ be a generic twisted flag variety of $G$. Extending the Hilbert basis techniques to Laurent polynomials over integers we give an explicit presentation of the…

Algebraic Geometry · Mathematics 2017-11-01 Sanghoon Baek , Rostislav Devyatov , Kirill Zainoulline

The skew Schubert polynomials are those which are indexed by skew elements of the Weyl group, in the sense of arXiv:0812.0639. We obtain tableau formulas for the double versions of these polynomials in all four classical Lie types, where…

Combinatorics · Mathematics 2024-01-30 Harry Tamvakis

Schur functions satisfy the relative Pl\"ucker relations which describe the projective embedding of the flag varieties and the Hirota bilinear equations for the modified KP hierarchies. These relative Pl\"ucker relations are generalized to…

Exactly Solvable and Integrable Systems · Physics 2025-10-01 Kazuya Aokage , Eriko Shinkawa , Hiro-Fumi Yamada

We formulate a nonrecursive combinatorial rule for the expansion of the stable Grothendieck polynomials of [Fomin-Kirillov '94] in the basis of stable Grothendieck polynomials for partitions. This gives a common generalization, as well as…

Combinatorics · Mathematics 2010-02-17 Anders S. Buch , Andrew Kresch , Mark Shimozono , Harry Tamvakis , Alexander Yong

In 2007 Lam and Pylyavskyy found a combinatorial formula for the dual stable Grothendieck polynomials, which are the dual basis of the stable Grothendieck polynomials with respect to the Hall inner product. In 2016 Galashin, Grinberg, and…

Combinatorics · Mathematics 2021-01-28 Jang Soo Kim

Grothendieck polynomials were introduced by Lascoux and Sch\"utzenberger, and they play an important role in K-theoretic Schubert calculus. In this paper, we give a new definition of double stable Grothendieck polynomials based on an…

Algebraic Topology · Mathematics 2018-11-07 Richard Rimanyi , Andras Szenes

The plethystic transformation $f[X] \mapsto f[X/(1-t)]$ and LLT polynomials are central to the theory of symmetric Macdonald polynomials. In this work, we introduce and study nonsymmetric flagged LLT polynomials. We show that these admit…

Combinatorics · Mathematics 2025-07-29 Jonah Blasiak , Mark Haiman , Jennifer Morse , Anna Pun , George H. Seelinger

We consider equivariant integrals on flag manifolds of type $A$. Using a computational method inspired by the theory of wall-crossing formulas by Takuro Mochizuki, we re-prove residue formulas for equivariant integrals given by Weber and…

Algebraic Geometry · Mathematics 2024-07-25 Ryo Ohkawa

For any positive integer $k$ and nonnegative integer $m$, we consider the symmetric function $G\left( k,m\right)$ defined as the sum of all monomials of degree $m$ that involve only exponents smaller than $k$. We call $G\left( k,m\right)$ a…

Combinatorics · Mathematics 2023-09-26 Darij Grinberg

In this note we classify when a skew Schur function is a positive linear combination of power sum symmetric functions. We then use this to determine precisely when any scalar multiple of a skew Schur function is the chromatic symmetric…

Combinatorics · Mathematics 2018-09-03 Soojin Cho , Stephanie van Willigenburg

We introduce a new basis for the polynomial ring which lifts the complete homogeneous symmetric polynomials while retaining representation theoretic significance. Using a specialized RSK algorithm we give an explicit nonnegative expansion…

Combinatorics · Mathematics 2023-05-08 Henry Ehrhard
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