Advances on Strictly -Modular IPs

M Nägele, C Nöbel, R Santiago… - … Conference on Integer …, 2023 - Springer
There has been significant work recently on integer programs (IPs) min {c⊤ x: A x≤ b, x∈ Z
n} with a constraint marix A with bounded subdeterminants. This is motivated by a well …

Improving the Cook et al. proximity bound given integral valued constraints

M Celaya, S Kuhlmann, J Paat… - … Conference on Integer …, 2022 - Springer
Consider a linear program of the form max {c⊤ x: A x≤ b}, where A is an m× n integral
matrix. In 1986 Cook, Gerards, Schrijver, and Tardos proved that, given an optimal solution …

On the Congruency-Constrained Matroid Base

S Liu, C Xu - International Conference on Integer Programming and …, 2024 - Springer
Consider a matroid where all elements are labeled with an element in Z. We are interested
in finding a base where the sum of the labels is congruent to g (mod m). We show that this …

On the Maximal Number of Columns of a -modular Matrix

G Averkov, M Schymura - International conference on integer …, 2022 - Springer
We study the maximal number of pairwise distinct columns in a Δ-modular integer matrix
with m rows. Recent results by Lee et al. provide an asymptotically tight upper bound of O (m …

On the Column Number and Forbidden Submatrices for -Modular Matrices

J Paat, I Stallknecht, Z Walsh, L Xu - SIAM Journal on Discrete Mathematics, 2024 - SIAM
An integer matrix is-modular if the determinant of each submatrix of has absolute value at
most. The study of-modular matrices appears in the theory of integer programming, where …

Proximity and flatness bounds for linear integer optimization

M Celaya, S Kuhlmann, J Paat… - Mathematics of …, 2023 - pubsonline.informs.org
This paper deals with linear integer optimization. We develop a technique that can be
applied to provide improved upper bounds for two important questions in linear integer …

On the size of integer programs with bounded non-vanishing subdeterminants

B Kriepke, GM Kyureghyan, M Schymura - arXiv preprint arXiv:2309.03772, 2023 - arxiv.org
Motivated by complexity questions in integer programming, this paper aims to contribute to
the understanding of combinatorial properties of integer matrices of row rank $ r $ and with …

On lattice width of lattice-free polyhedra and height of Hilbert bases

M Henk, S Kuhlmann, R Weismantel - SIAM Journal on Discrete Mathematics, 2022 - SIAM
We study the lattice width of lattice-free polyhedra given by Ax≦b in terms of Δ(A), the
maximal n*n minor in absolute value of A∈Z^m*n. Our main contribution is to link the lattice …

New bounds for the integer Carathéodory rank

I Aliev, M Henk, M Hogan, S Kuhlmann, T Oertel - SIAM Journal on …, 2024 - SIAM
Given a rational pointed-dimensional cone, we study the integer Carathéodory rank and its
asymptotic form, where we consider “most” integer vectors in the cone. The main result …

Problems on Group-labeled Matroid Bases

F Hörsch, A Imolay, R Mizutani, T Oki… - arXiv preprint arXiv …, 2024 - arxiv.org
Consider a matroid equipped with a labeling of its ground set to an abelian group. We define
the label of a subset of the ground set as the sum of the labels of its elements. We study a …