Content available in repository
Content available in repository
Personal profile
Research profile
Christopher Hojny is an assistant professor working at TU/e since October 2019. His main research topic is the development of efficient techniques to handle symmetries in mixed-integer programs. Besides symmetry handling, he is also interested in theoretical properties of integer programs (e.g., the existence of formulations with certain properties) and developing integer programming approaches to solve combinatorial optimization problems. Christopher is also a co-developer of the academic solver SCIP.
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
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Collaborations and top research areas from the last five years
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On the Expressiveness of Rational ReLU Neural Networks With Bounded Depth
Averkov, G., Hojny, C. & Merkert, M., 22 Jan 2025, The Thirteenth Internatinal Conference on Learning Representations, ICLR 2025. OpenReview.net, 15 p.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review
Open AccessFile19 Downloads (Pure) -
A Flow-Based Formulation for Parallel Machine Scheduling Using Decision Diagrams
Kowalczyk, D., Leus, R. (Corresponding author), Hojny, C. & Røpke, S., Nov 2024, In: INFORMS Journal on Computing. 36, 6, p. 1696-1714 19 p.Research output: Contribution to journal › Article › Academic › peer-review
2 Citations (Scopus) -
A simple method for convex optimization in the oracle model
Dadush, D., Hojny, C. (Corresponding author), Huiberts, S. & Weltge, S., Jul 2024, In: Mathematical Programming. 206, 1-2, p. 283-304 22 p.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile31 Downloads (Pure) -
A unified framework for symmetry handling
van Doornmalen, M. J. (Corresponding author) & Hojny, C., 4 Jun 2024, (E-pub ahead of print) In: Mathematical Programming. XX, XResearch output: Contribution to journal › Article › Academic › peer-review
Open Access -
Cutting Plane Approaches for the Robust Kidney Exchange Problem
Blom, D. A. M. P. (Corresponding author), Hojny, C. & Smeulders, B. M. L., Feb 2024, In: Computers & Operations Research. 162, 24 p., 106470.Research output: Contribution to journal › Article › Academic › peer-review
Open AccessFile1 Citation (Scopus)71 Downloads (Pure)
Datasets
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supplement_reflection_symmetries: Online Supplement for the Article on Reflection Symmetries
Hojny, C. (Creator), Zenodo, 14 May 2024
Dataset
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christopherhojny/relaxation_complexity
Averkov, G. (Contributor), Hojny, C. (Creator) & Schymura, M. (Contributor), Eindhoven University of Technology, 21 Mar 2023
Dataset
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The SCIP Optimization Suite 8.0.0
Bestuzheva, K. (Creator), Besançon, M. (Creator), Chen, W.-K. (Creator), Chimela, A. (Creator), Donkiewicz, T. (Creator), van Doornmalen, J. (Creator), Eifler, L. (Creator), Gaul, O. (Creator), Gamrath, G. (Creator), Gleixner, A. (Creator), Gottwald, L. (Creator), Graczyk, C. (Creator), Halbig, K. (Creator), Hendel, G. (Creator), Hoen, A. (Creator), Hojny, C. (Creator), van der Hulst, R. (Creator), Koch, T. (Creator), Lübbecke, M. (Creator), Maher, S. J. (Creator), Matter, F. (Creator), Mühmer, E. (Creator), Müller, B. (Creator), Pfetsch, M. E. (Creator), Rehfeldt, D. (Creator), Schlein, S. (Creator), Schlösser, F. (Creator), Serrano, F. (Creator), Shinano, Y. (Creator), Sofranac, B. (Creator), Turner, M. (Creator), Vigerske, S. (Creator), Wegscheider, F. (Creator), Wellner, P. (Creator), Weninger, D. (Creator) & Witzig, J. (Creator), Zenodo, 5 Apr 2022
Dataset
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scipopt/scip: v8.0.0
Bestuzheva, K. (Creator), Besançon, M. (Creator), Chen, W.-K. (Creator), Chimela, A. (Creator), Donkiewicz, T. (Creator), van Doornmalen, J. (Creator), Eifler, L. (Creator), Gaul, O. (Creator), Gottwald, L. (Creator), Graczyk, C. (Creator), Halbig, K. (Creator), Hoen, A. (Creator), Hojny, C. (Creator), van der Hulst, R. (Creator), Koch, T. (Creator), Lübbecke, M. (Creator), Maher, S. J. (Creator), Matter, F. (Creator), Mühmer, E. (Creator), Müller, B. (Creator), Pfetsch, M. E. (Creator), Rehfeldt, D. (Creator), Schlein, S. (Creator), Schlösser, F. (Creator), Serrano, F. (Creator), Shinano, Y. (Creator), Sofranac, B. (Creator), Turner, M. (Creator), Vigerske, S. (Creator), Wegscheider, F. (Creator), Wellner, P. (Creator), Weninger, D. (Creator) & Witzig, J. (Creator), Zenodo, 5 Apr 2022
Dataset
Prizes
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Mathematical Programming Meritorious Service Award 2022
Hojny, C. (Recipient), 31 Jan 2023
Prize: Other › Scientific
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Preis für hervorragende wissenschaftliche Leistungen
Hojny, C. (Recipient), 2019
Prize: Other › Career, activity or publication related prizes (lifetime, best paper, poster etc.) › Scientific
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Symmetries in Optimization - An Overview
Hojny, C. (Speaker)
24 Mar 2025Activity: Talk or presentation types › Invited talk › Scientific
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Workshop on Symmetry Handling for Satisfiability and Optimization
Anders, M. (Organiser), Hojny, C. (Organiser) & Pfetsch, M. E. (Organiser)
2025 → …Activity: Participating in or organising an event types › Workshop, seminar, course or exhibition › Scientific
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Detecting and Handling Symmetries in MINLP
Hojny, C. (Speaker)
13 Nov 2024Activity: Talk or presentation types › Invited talk › Scientific
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Detecting and Handling Symmetries in MINLP
Hojny, C. (Speaker)
23 Sept 2024Activity: Talk or presentation types › Invited talk › Scientific
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Detecting and Handling Reflection Symmetries in MINLP
Hojny, C. (Speaker)
26 Jul 2024Activity: Talk or presentation types › Invited talk › Scientific