Improving proximity bounds using sparsity

J Lee, J Paat, I Stallknecht, L Xu - … ISCO 2020, Montreal, QC, Canada, May …, 2020 - Springer
We refer to the distance between optimal solutions of integer programs and their linear
relaxations as proximity. In 2018 Eisenbrand and Weismantel proved that proximity is …

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 …

A colorful Steinitz Lemma with application to block-structured integer programs

T Oertel, J Paat, R Weismantel - Mathematical Programming, 2024 - Springer
The Steinitz constant in dimension d is the smallest value c (d) such that for any norm on R d
and for any finite zero-sum sequence in the unit ball, the sequence can be permuted such …

On -modular integer linear problems in the canonical form and equivalent problems

D Gribanov, I Shumilov, D Malyshev… - Journal of Global …, 2024 - Springer
Many papers in the field of integer linear programming (ILP, for short) are devoted to
problems of the type max {c⊤ x: A x= b, x∈ Z≥ 0 n}, where all the entries of A, b, c are …

The distributions of functions related to parametric integer optimization

T Oertel, J Paat, R Weismantel - SIAM Journal on Applied Algebra and …, 2020 - SIAM
We consider the asymptotic distribution of the integer program (IP) sparsity function, which
measures the minimal support of optimal IP solutions, and the IP to linear program (LP) …

Zero-One Laws for Random Feasibility Problems

DJ Altschuler - arXiv preprint arXiv:2309.13133, 2023 - arxiv.org
We introduce a general random model of a combinatorial optimization problem with
geometric structure that encapsulates both linear programming and integer linear …

Proximity and flatness bounds for linear integer optimization

M Celaya, S Kuhlmann, J Paat… - Mathematics of …, 2024 - 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 …

Distance-sparsity transference for vertices of corner polyhedra

I Aliev, M Celaya, M Henk, A Williams - SIAM Journal on Optimization, 2021 - SIAM
We obtain a transference bound for vertices of corner polyhedra that connects two well-
established areas of research: proximity and sparsity of solutions to integer programs. In the …

On matrices over a polynomial ring with restricted subdeterminants

M Celaya, S Kuhlmann, R Weismantel - International Conference on …, 2024 - Springer
This paper introduces a framework to study discrete optimization problems which are
parametric in the following sense: their constraint matrices correspond to matrices over the …

Sparsity and integrality gap transference bounds for integer programs

I Aliev, M Celaya, M Henk - International Conference on Integer …, 2024 - Springer
We obtain new transference bounds that connect two active areas of research: proximity and
sparsity of solutions to integer programs. Specifically, we study the additive integrality gap of …