activity
20202026
most citedA Fourfold Refined Enumeration of Alternating Sign Trapezoids

2 citations · 3 across the 6 of their papers we have counts for

collaborators

7 papers

math.CO2026

Pattern avoidance in alternating sign rectangles I: Extended avoidance

Hans Höngesberg, Matjaž Konvalinka, Svante Linusson

We introduce extendable pattern avoidance for alternating sign rectangles (ASRs), the natural rectangular generalization of alternating sign matrices (ASMs). An ASR extendably avoi…

math.CO2025

A Littlewood-type identity for Robbins polynomials

Ilse Fischer, Hans Höngesberg

We provide a generalization of the Littlewood identity, both sides of which are related to alternating sign matrices. The classical Littlewood identity establishes a nice product f…

math.CO2024

A generalization of conjugation of integer partitions

Seamus Albion, Theresia Eisenkölbl, Ilse Fischer +4

We exhibit, for any positive integer parameter , an involution on the set of integer partitions of . These involutions show the joint symmetry of the distributions of the fol…

math.CO2023★ 1 cited

Skew symplectic and orthogonal characters through lattice paths

Seamus P. Albion, Ilse Fischer, Hans Höngesberg +1

The skew Schur functions admit many determinantal expressions. Chief among them are the (dual) Jacobi-Trudi formula and the Lascoux-Pragacz formula, which is a skew analogue of the…

math.CO2022

Alternating sign matrices with reflective symmetry and plane partitions: pairs of equivalent statistics and a Cauchy-type identity

Ilse Fischer, Hans Höngesberg

Vertically symmetric alternating sign matrices (VSASMs) of order are known to be equinumerous with lozenge tilings of a hexagon with side lengths , , , ,…

math.CO2021

Weight-preserving bijections between integer partitions and a class of alternating sign trapezoids

Hans Höngesberg

We construct weight-preserving bijections between column strict shifted plane partitions with one row and alternating sign trapezoids with exactly one column in the left half that…

math.CO2020★ 2 cited

A Fourfold Refined Enumeration of Alternating Sign Trapezoids

Hans Höngesberg

Alternating sign trapezoids have recently been introduced as a generalisation of alternating sign triangles. Fischer established a threefold refined enumeration of alternating sign…