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We show that three notions of rank for matrices of multilinear forms are equivalent. This result generalizes a classical result of Flanders, corrects a minor hole in work of Fortin and Reutenauer, answers a question of Lampert on the…

组合数学 · 数学 2026-03-12 Guy Moshkovitz , Daniel G. Zhu

Fully inhomogeneous spin Hall-Littlewood symmetric rational functions $F_\lambda$ are multiparameter deformations of the classical Hall-Littlewood symmetric polynomials and can be viewed as partition functions in $\mathfrak{sl}(2)$ higher…

组合数学 · 数学 2021-10-05 Svetlana Gavrilova

It has been proven that the lozenge tilings of a quartered hexagon on the triangular lattice are enumerated by a simple product formula. In this paper we give a new proof for the tiling formula by using Kuo's graphical condensation. Our…

组合数学 · 数学 2015-04-28 Tri Lai

Vertically symmetric alternating sign matrices (VSASMs) of order $2n+1$ are known to be equinumerous with lozenge tilings of a hexagon with side lengths $2n+2$, $2n$, $2n+2$, $2n$, $2n+2$, $2n$ and a central triangular hole of size $2$ that…

组合数学 · 数学 2025-10-10 Ilse Fischer , Hans Höngesberg

We exhibit a weight-preserving bijection between semi-standard Young tableaux and semi-skyline augmented fillings to provide a combinatorial proof that the Schur functions decompose into nonsymmetric functions indexed by compositions. The…

组合数学 · 数学 2009-04-02 Sarah Mason

We consider pairs of a set-valued column-strict tableau and a reverse plane partition of the same shape. We introduce algortithms for them, which implies a bijective proof for the finite sum Cauchy identity for Grothendieck polynomials and…

组合数学 · 数学 2016-04-04 Yasuhide Numata

Presented are polynomial identities which imply generalizations of Euler and Rogers--Ramanujan identities. Both sides of the identities can be interpreted as generating functions of certain restricted partitions. We prove the identities by…

高能物理 - 理论 · 物理学 2009-10-28 Omar Foda , Yas-Hiro Quano

Some new identities for Schur functions are proved. In particular, we settle in the affirmative a recent conjecture of Ishikawa-Wakayama and solve a problem raised by Bressoud.

组合数学 · 数学 2007-05-23 F. Jouhet , J. Zeng

Recently Andrews and Bachraoui proved identities relating certain restricted partitions into distinct even parts with restricted 4-regular partitions by the theory of basic hypergeometric series. They also posed a question regarding…

组合数学 · 数学 2025-09-01 Dandan Chen , Ziyin Zou

In this paper, we generalize recent work of Mizuhara, Sellers, and Swisher that gives a method for establishing restricted plane partition congruences based on a bounded number of calculations. Using periodicity for partition functions, our…

数论 · 数学 2017-04-14 Ali H. Al-Saedi

We introduce a new infinite class of superintegrable quantum systems in the plane. Their Hamiltonians involve reflection operators. The associated Schr\"odinger equations admit separation of variables in polar coordinates and are exactly…

数学物理 · 物理学 2015-05-30 Sarah Post , Luc Vinet , Alexei Zhedanov

We prove the 4-uniform Erd\H{o}s Matching Conjecture for every matching number $s\ge 6961$. The proof has two parts. First, building on ideas from Frankl--R\"odl--Ruci\'nski, we formulate a general finite-board criterion for the $r$-uniform…

组合数学 · 数学 2026-05-26 Jianfeng Hou , Caiyun Hu , Xizhi Liu

Motivated by the enumeration of a class of plane partitions studied by Proctor and by considerations about symmetry classes of plane partitions, we consider the problem of enumerating lozenge tilings of a hexagon with ``maximal staircases''…

组合数学 · 数学 2007-05-23 Mihai Ciucu , Christian Krattenthaler

We study a multi-symmetric generalization of the classical Schur functions called the multi-symmetric Schur functions. These functions form an integral basis for the ring of multi-symmetric functions indexed by tuples of partitions and are…

组合数学 · 数学 2025-09-23 Milo Bechtloff Weising

In this note, we will give a short proof of an identity for cubic partitions.

数论 · 数学 2015-03-17 Xinhua Xiong

In this paper we present a combinatorial generalization of the fact that the number of plane partitions that fit in a $2a\times b\times b$ box is equal to the number of such plane partitions that are symmetric, times the number of such…

组合数学 · 数学 2017-02-13 Mihai Ciucu , Christian Krattenthaler

Plane partitions in the totally symmetric self-complementary symmetry class (TSSCPP) are known to be equinumerous with n x n alternating sign matrices, but no explicit bijection is known. In this paper, we give a bijection from these plane…

组合数学 · 数学 2024-11-26 Vincent Holmlund , Jessica Striker

The Cauchy identities play an important role in the theory of symmetric functions. It is known that Cauchy sums for the $q$-Whittaker and the skew Schur polynomials produce the same factorized expressions modulo a $q$-Pochhammer symbol. We…

组合数学 · 数学 2024-07-17 Takashi Imamura , Matteo Mucciconi , Tomohiro Sasamoto

Reiner, Shaw and van Willigenburg showed that if two skew Schur functions s_A and s_B are equal, then the skew shapes A and B must have the same "row overlap partitions." Here we show that these row overlap equalities are also implied by a…

组合数学 · 数学 2014-02-13 Peter R. W. McNamara

We consider Schur function expansion for the partition function of the model of normal matrices. We show that this expansion coincides with Takasaki expansion \cite{Tinit} for tau functions of Toda lattice hierarchy. We show that the…

数学物理 · 物理学 2009-11-11 A. Yu. Orlov , T. Shiota