Search Results for author: Jannis Kurtz

Found 9 papers, 6 papers with code

From Large Language Models and Optimization to Decision Optimization CoPilot: A Research Manifesto

no code implementations26 Feb 2024 Segev Wasserkrug, Leonard Boussioux, Dick den Hertog, Farzaneh Mirzazadeh, Ilker Birbil, Jannis Kurtz, Donato Maragno

Significantly simplifying the creation of optimization models for real-world business problems has long been a major goal in applying mathematical optimization more widely to important business and societal decisions.

Decision Making

Neur2BiLO: Neural Bilevel Optimization

1 code implementation4 Feb 2024 Justin Dumouchelle, Esther Julien, Jannis Kurtz, Elias B. Khalil

Bilevel optimization deals with nested problems in which a leader takes the first decision to minimize their objective function while accounting for a follower's best-response reaction.

Bilevel Optimization

Neur2RO: Neural Two-Stage Robust Optimization

1 code implementation6 Oct 2023 Justin Dumouchelle, Esther Julien, Jannis Kurtz, Elias B. Khalil

This work addresses two-stage robust optimization (2RO) problems (also called adjustable robust optimization), wherein first-stage and second-stage decisions are made before and after uncertainty is realized, respectively.

Decision Making

Finding Regions of Counterfactual Explanations via Robust Optimization

1 code implementation26 Jan 2023 Donato Maragno, Jannis Kurtz, Tabea E. Röber, Rob Goedhart, Ş. Ilker Birbil, Dick den Hertog

To this end, our method provides a whole region of CEs allowing the user to choose a suitable recourse to obtain a desired outcome.

counterfactual Counterfactual Explanation +1

Data-driven Prediction of Relevant Scenarios for Robust Combinatorial Optimization

no code implementations30 Mar 2022 Marc Goerigk, Jannis Kurtz

We study iterative methods for (two-stage) robust combinatorial optimization problems with discrete uncertainty.

Combinatorial Optimization Feature Importance

Ensemble Methods for Robust Support Vector Machines using Integer Programming

1 code implementation3 Mar 2022 Jannis Kurtz

We study robust support vector machines (SVM) and extend the classical approach by an ensemble method which iteratively solves a non-robust SVM on different perturbations of the dataset, where the perturbations are derived by an adversarial problem.

Binary Classification

Efficient and Robust Mixed-Integer Optimization Methods for Training Binarized Deep Neural Networks

1 code implementation21 Oct 2021 Jannis Kurtz, Bubacarr Bah

Compared to classical deep neural networks its binarized versions can be useful for applications on resource-limited devices due to their reduction in memory consumption and computational demands.

Data-Driven Robust Optimization using Unsupervised Deep Learning

1 code implementation19 Nov 2020 Marc Goerigk, Jannis Kurtz

Robust optimization has been established as a leading methodology to approach decision problems under uncertainty.

Clustering

An Integer Programming Approach to Deep Neural Networks with Binary Activation Functions

no code implementations7 Jul 2020 Bubacarr Bah, Jannis Kurtz

We study deep neural networks with binary activation functions (BDNN), i. e. the activation function only has two states.

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