
Jannis Halbey
My main interest lies in first-order methods for convex optimization. Lately I have worked on solving problems in semi-definite programming using conditional gradient methods.
Contact
- office
- Room 3107 at ZIB
- email shown with JavaScript enabled
- homepage
- jannishal.github.io
- languages
- English and German
Curriculum vitae
- since 2022
- Researcher at TUB
- Sep 2022
- M.Sc. in Mathematics at Technical University of Darmstadt
- Mar 2020
- B.Sc. in Mathematics at Technical University of Darmstadt
Publications and preprints
Conference contributions
- Halbey, J., Roux, C., and Pokutta, S. Curvature-Dependent Lower Bounds for Frank-Wolfe. Advances in Neural Information Processing Systems, 39.
To appear.
Associated with NeurIPS 2026.
[arXiv]
[BibTeX]
@inproceedings{2026_HalbeyRouxPokutta_Curvaturelowerbounds_2605-10595, booktitle = {Advances in Neural Information Processing Systems}, series = {Advances in Neural Information Processing Systems}, volume = {39}, publisher = {Curran Associates}, note = {To appear}, archiveprefix = {arXiv}, eprint = {2605.10595}, arxiv = {arXiv:2605.10595}, primaryclass = {math.OC}, author = {Halbey, Jannis and Roux, Christophe and Pokutta, Sebastian}, title = {Curvature-Dependent Lower Bounds for Frank-Wolfe} } - Halbey, J., Deza, D., Zimmer, M., Roux, C., Stellato, B., and Pokutta, S. (2026). Lower Bounds for Frank-Wolfe on Strongly Convex Sets. Proceedings of the 43rd International Conference on Machine Learning, 306.
Associated with ICML 2026.
[arXiv]
[BibTeX]
@inproceedings{2026_HalbeyEtAl_Lowerboundsfrankwolfe_2602-04378, year = {2026}, booktitle = {Proceedings of the 43rd International Conference on Machine Learning}, series = {Proceedings of Machine Learning Research}, volume = {306}, month = jul, archiveprefix = {arXiv}, eprint = {2602.04378}, arxiv = {arXiv:2602.04378}, primaryclass = {math.OC}, author = {Halbey, Jannis and Deza, Daniel and Zimmer, Max and Roux, Christophe and Stellato, Bartolomeo and Pokutta, Sebastian}, title = {Lower Bounds for Frank-Wolfe on Strongly Convex Sets} } - Halbey, J., Rakotomandimby, S., Besançon, M., Designolle, S., and Pokutta, S. (2025). Efficient Quadratic Corrections for Frank-Wolfe Algorithms. Advances in Neural Information Processing Systems, 38.
Associated with NeurIPS 2025.
[arXiv]
[BibTeX]
@inproceedings{2025_HalbeyRakotomandimbyBesanconDesignollePokutta_Quadraticcorrections_2506-02635, year = {2025}, booktitle = {Advances in Neural Information Processing Systems}, series = {Advances in Neural Information Processing Systems}, volume = {38}, publisher = {Curran Associates}, month = sep, archiveprefix = {arXiv}, eprint = {2506.02635}, arxiv = {arXiv:2506.02635}, primaryclass = {math.OC}, author = {Halbey, Jannis and Rakotomandimby, Seta and Besançon, Mathieu and Designolle, Sébastien and Pokutta, Sebastian}, title = {Efficient Quadratic Corrections for Frank-Wolfe Algorithms} }
Articles, chapters and books
- Liu, Y.-C., Halbey, J., Pokutta, S., and Designolle, S. (2026). A Unified Toolbox for Multipartite Entanglement Certification. Physical Review A.
To appear.
DOI: 10.1103/tfsh-lwdj
[URL]
[arXiv]
[BibTeX]
@article{2025_LiuHalbeyPokuttaDesignolle_Unifiedtoolboxmultipartite_2507-17435, year = {2026}, journal = {Physical Review A}, month = oct, doi = {10.1103/tfsh-lwdj}, note = {To appear}, url = {https://journals.aps.org/pra/accepted/10.1103/tfsh-lwdj}, archiveprefix = {arXiv}, eprint = {2507.17435}, arxiv = {arXiv:2507.17435}, primaryclass = {quant-ph}, author = {Liu, Ye-Chao and Halbey, Jannis and Pokutta, Sebastian and Designolle, Sébastien}, title = {A Unified Toolbox for Multipartite Entanglement Certification} } - Braun, G., Halbey, J., Pokutta, S., and Woodstock, Z. (2026). Flexible block-iterative analysis for the Frank-Wolfe algorithm. Journal of Optimization Theory and Applications, 210(37).
DOI: 10.1007/s10957-026-03068-1
[URL]
[arXiv]
[BibTeX]
@article{2024_BraunHalbeyPokuttaWoodstock_Blockiterativeanalysis, year = {2026}, date = {2026-07-31}, journal = {Journal of Optimization Theory and Applications}, volume = {210}, number = {37}, doi = {10.1007/s10957-026-03068-1}, url = {https://link.springer.com/article/10.1007/s10957-026-03068-1}, archiveprefix = {arXiv}, eprint = {2409.06931}, arxiv = {arXiv:2409.06931}, primaryclass = {math.OC}, author = {Braun, Gábor and Halbey, Jannis and Pokutta, Sebastian and Woodstock, Zev}, title = {Flexible block-iterative analysis for the Frank-Wolfe algorithm} } - Besançon, M., Designolle, S., Halbey, J., Hendrych, D., Kuzinowicz, D., Pokutta, S., Troppens, H., Viladrich Herrmannsdoerfer, D., and Wirth, E. (2025). Improved Algorithms and Novel Applications of the FrankWolfe.jl Library. ACM Transactions on Mathematical Software, 51(4), 1–33.
DOI: 10.1145/3765626
[URL]
[arXiv]
[BibTeX]
@article{2025_BesanconEtAl_Frankwolfelibrary, year = {2025}, date = {2025-12-12}, journal = {ACM Transactions on Mathematical Software}, month = dec, volume = {51}, number = {4}, pages = {1--33}, doi = {10.1145/3765626}, url = {https://dl.acm.org/doi/10.1145/3765626}, archiveprefix = {arXiv}, eprint = {2501.14613}, arxiv = {arXiv:2501.14613}, primaryclass = {math.OC}, author = {Besançon, Mathieu and Designolle, Sébastien and Halbey, Jannis and Hendrych, Deborah and Kuzinowicz, Dominik and Pokutta, Sebastian and Troppens, Hannah and Viladrich Herrmannsdoerfer, Daniel and Wirth, Elias}, title = {Improved Algorithms and Novel Applications of the FrankWolfe.jl Library} }
Talks and posters
Conference and workshop talks
- Jul 2025
- Corrective Frank-Wolfe: Unifying and Extending Correction Steps by Jannis Halbey
22nd Conference on Advances in Continuous Optimization (EUROPT), Southampton
Research seminar talks
- Sep 2026
- Curvature-Dependent Lower Bounds for Frank-Wolfe by Jannis Halbey
GHOST Research Seminar (GHOST), Grenoble - Apr 2025
- Frank-Wolfe for Strongly Convex Sets by Jannis Halbey
IOL Research Seminar (IOL), Berlin
Poster presentations
- Jul 2026
- Curvature-Dependent Lower Bounds for Frank-Wolfe by Jannis Halbey
8th DOxML Conference, Ookayama - Jul 2026
- Lower Bounds for Frank-Wolfe on Strongly Convex Sets by Jannis Halbey
43rd International Conference on Machine Learning (ICML), Seoul - Dec 2025
- Efficient Quadratic Corrections for Frank-Wolfe Algorithms by Jannis Halbey
39th conference on neural information processing systems (NeurIPS), San Diego
Events
- winter 2026
- Machine Learning and Optimization, Berlin
- Jul 2026
- 8th DOxML Conference, Ookayama
- Jul 2026
- 43rd International Conference on Machine Learning (ICML), Seoul
- summer 2026
- Modern Topics in Machine Learning and Optimization, Berlin
- Dec 2025
- 39th conference on neural information processing systems (NeurIPS), San Diego
- winter 2025
- Discrete Optimization and Machine Learning, Berlin
- winter 2025
- Analysis 1 and Linear Algebra for Engineers, Berlin
- Jun 2025
- 22nd Conference on Advances in Continuous Optimization (EUROPT), Southampton
- summer 2025
- Discrete Optimization and Machine Learning, Berlin
- summer 2025
- Analysis II for Engineers, Berlin
- winter 2024
- Discrete Optimization and Machine Learning, Berlin
- winter 2024
- Analysis 1 and Linear Algebra for Engineers, Berlin
- Sep 2024
- 5th Computational Optimization at Work (CO@Work), Berlin
- summer 2024
- Discrete Optimization and Machine Learning, Berlin
- summer 2024
- Analysis II for Engineers, Berlin
- winter 2023
- Discrete Optimization and Machine Learning, Berlin
- winter 2023
- Analysis 1 and Linear Algebra for Engineers, Berlin
- summer 2023
- Discrete Optimization and Machine Learning, Berlin
- summer 2023
- Analysis II for Engineers, Berlin
- winter 2022
- Discrete Optimization and Machine Learning, Berlin
- winter 2022
- Analysis II for Engineers, Berlin
Teaching
- winter 2026
- Teaching Assistant for Machine Learning and Optimization at TUB
- winter 2026
- Assistant for analysis 1 and linear algebra for engineering at TUB
- summer 2026
- Teaching Assistant for Modern Topics in Machine Learning and Optimization at TUB
- summer 2026
- Assistant for analysis 2 for Engineering at TUB
- winter 2025
- Teaching Assistant for Discrete Optimization and Machine Learning at TUB
- winter 2025
- Teaching Assistant for Analysis 1 and Linear Algebra for Engineers at TUB
- summer 2025
- Teaching Assistant for Discrete Optimization and Machine Learning at TUB
- summer 2025
- Teaching Assistant for Analysis II for Engineers at TUB
- winter 2024
- Teaching Assistant for Discrete Optimization and Machine Learning at TUB
- winter 2024
- Teaching Assistant for Analysis 1 and Linear Algebra for Engineers at TUB
- summer 2024
- Teaching Assistant for Discrete Optimization and Machine Learning at TUB
- summer 2024
- Teaching Assistant for Analysis II for Engineers at TUB
- winter 2023
- Teaching Assistant for Discrete Optimization and Machine Learning at TUB
- winter 2023
- Teaching Assistant for Analysis 1 and Linear Algebra for Engineers at TUB
- summer 2023
- Teaching Assistant for Discrete Optimization and Machine Learning at TUB
- summer 2023
- Teaching Assistant for Analysis II for Engineers at TUB
- winter 2022
- Teaching Assistant for Discrete Optimization and Machine Learning at TUB
- winter 2022
- Teaching Assistant for Analysis II for Engineers at TUB