Christoph Spiegel
deputy department head at ZIB starting 2022postdoctoral researcher at ZIB since August 2020
📬 Contact
office | Room 3036 at ZIB |
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spiegel (at) zib.de spiegel (at) campus.tu-berlin.de |
|
homepage | christophspiegel.berlin |
languages | German, English, and French |
🎓 Academic Background
Jun 2020 | Ph.D. in Applied Mathematics at UPC |
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Mar 2015 | M.Sc. in Mathematics at FUB |
Dec 2012 | B.Sc. in Mathematics at FUB |
🔬 Research
Preprints
- Mundinger, K., Pokutta, S., Spiegel, C., and Zimmer, M. (2024). Extending the Continuum of Six-Colorings.
[arXiv]
[BibTeX]
- Kiem, A., Pokutta, S., and Spiegel, C. (2023). The 4-color Ramsey Multiplicity of Triangles.
[arXiv]
[code]
[BibTeX]
- Zimmer, M., Andoni, M., Spiegel, C., and Pokutta, S. (2023). PERP: Rethinking the Prune-Retrain Paradigm in the Era of LLMs.
[arXiv]
[code]
[BibTeX]
- Zimmer, M., Spiegel, C., and Pokutta, S. (2022). Compression-aware Training of Neural Networks Using Frank-Wolfe.
[arXiv]
[BibTeX]
- Combettes, C., Spiegel, C., and Pokutta, S. (2020). Projection-free Adaptive Gradients for Large-scale Optimization.
[arXiv]
[summary]
[code]
[BibTeX]
- Pokutta, S., Spiegel, C., and Zimmer, M. (2020). Deep Neural Network Training with Frank-Wolfe.
[arXiv]
[summary]
[code]
[BibTeX]
- Salia, N., Spiegel, C., Tompkins, C., and Zamora, O. (2019). Independent Chains in Acyclic Posets.
[arXiv]
[BibTeX]
Conference proceedings
- Zimmer, M., Spiegel, C., and Pokutta, S. (2024). Sparse Model Soups: A Recipe for Improved Pruning Via Model Averaging. Proceedings of International Conference on Learning Representations.
[arXiv]
[BibTeX]
- Parczyk, O., Pokutta, S., Spiegel, C., and Szabó, T. (2023). Fully Computer-assisted Proofs in Extremal Combinatorics. Proceedings of AAAI Conference on Artificial Intelligence.
[arXiv]
[slides]
[code]
[BibTeX]
- Rué Perna, J. J., and Spiegel, C. (2023). The Rado Multiplicity Problem in Vector Spaces Over Finite Fields. Proceedings of European Conference on Combinatorics.
[arXiv]
[code]
[BibTeX]
- Zimmer, M., Spiegel, C., and Pokutta, S. (2023). How I Learned to Stop Worrying and Love Retraining. Proceedings of International Conference on Learning Representations.
[arXiv]
[code]
[BibTeX]
- Parczyk, O., Pokutta, S., Spiegel, C., and Szabó, T. (2022). New Ramsey Multiplicity Bounds and Search Heuristics. Proceedings of Discrete Mathematics Days.
[arXiv]
[code]
[BibTeX]
- Rué Perna, J. J., and Spiegel, C. (2018). On a Problem of Sárközy and Sós for Multivariate Linear Forms. Proceedings of Discrete Mathematics Days.
[arXiv]
[BibTeX]
- Kusch, C., Rué Perna, J. J., Spiegel, C., and Szabó, T. (2017). Random Strategies Are Nearly Optimal for Generalized Van Der Waerden Games. Proceedings of European Conference on Combinatorics.
[URL]
[arXiv]
[BibTeX]
Full articles
- Kamčev, N., and Spiegel, C. (2022). Another Note on Intervals in the Hales-Jewett Theorem. Electronic Journal of Combinatorics, 29(1).
DOI: 10.37236/9400
[URL]
[arXiv]
[BibTeX]
- Cao-Labora, G., Rué Perna, J. J., and Spiegel, C. (2021-10). An Erdős-Fuchs Theorem for Ordered Representation Functions. Ramanujan Journal, 56, 183–2091.
DOI: 10.1007/s11139-020-00326-2
[URL]
[arXiv]
[BibTeX]
- Fabian, D., Rué Perna, J. J., and Spiegel, C. (2021-08). On Strong Infinite Sidon and Bₕ Sets and Random Sets of Integers. Journal of Combinatorial Theory, Series A, 182.
DOI: 10.1016/j.jcta.2021.105460
[URL]
[arXiv]
[BibTeX]
- Corsten, J., Mond, A., Pokrovskiy, A., Spiegel, C., and Szabó, T. (2020-10). On the Odd Cycle Game and Connected Rules. European Journal of Combinatorics, 89.
DOI: 10.1016/j.ejc.2020.103140
[URL]
[arXiv]
[BibTeX]
- Candela, P., Serra, O., and Spiegel, C. (2020). A Step Beyond Freĭman’s Theorem for Set Addition Modulo a Prime. Journal De Théorie Des Nombres De Bordeaux, 32(1), 275–289.
DOI: 10.5802/jtnb.1122
[URL]
[arXiv]
[BibTeX]
- Rué Perna, J. J., and Spiegel, C. (2020). On a Problem of Sárközy and Sós for Multivariate Linear Forms. Revista Matemática Iberoamericana, 36(7), 2107–2119.
DOI: 10.4171/RMI/1193
[URL]
[arXiv]
[BibTeX]
- Kusch, C., Rué Perna, J. J., Spiegel, C., and Szabó, T. (2019-09). On the Optimality of the Uniform Random Strategy. Random Structures & Algorithms, 55(2), 371–401.
DOI: 10.1002/rsa.20829
[URL]
[arXiv]
[BibTeX]
- Freĭman, G. A., Serra, O., and Spiegel, C. (2019). Additive Volume of Sets Contained in Few Arithmetic Progressions. INTEGERS, 19.
[URL]
[arXiv]
[BibTeX]
- Rué Perna, J. J., Spiegel, C., and Zumalacárregui, A. (2018). Threshold Functions and Poisson Convergence for Systems of Equations in Random Sets. Mathematische Zeitschrift, 288, 333–360.
DOI: 10.1007/s00209-017-1891-2
[URL]
[arXiv]
[BibTeX]
- Spiegel, C. (2017). A Note on Sparse Supersaturation and Extremal Results for Linear Homogeneous Systems. Electronic Journal of Combinatorics, 24(3).
DOI: 10.37236/6730
[URL]
[arXiv]
[BibTeX]
💬 Talks and posters
Conference and workshop talks
- Oct 2023
- BMS RTA 8 - Practical Course, Berlin [PDF]
- Aug 2023
- 12th EuroComb Conference [PDF]
- Aug 2023
- ICIAM 2023 Minisymposium: Advances in Optimization I, Tokyo [PDF]
- Aug 2023
- 5th DOxML Conference, Tokyo [PDF]
- Jun 2023
- FoCM 2023 Workshop I.3 Workshop, Paris [PDF]
View More / Less
- May 2023
- CANT Conference, New York [PDF]
- Mar 2023
- Optimization and ML Workshop, Waischenfeld [PDF]
- Feb 2023
- 37th AAAI Conference, Washington, DC [PDF]
- Jan 2023
- Aussois Workshop, Aussois [PDF]
- Dec 2022
- Recent Advances in Optimization Workshop, Toronto [PDF]
- Sep 2022
- 6th RIKEN-MODAL Workshop, Tokyo / Fukuoka [PDF]
- Jul 2022
- DMD Conference, Santander [PDF]
- Jun 2019
- 36th Postgraduate Combinatorial Conference, Oxford [PDF]
- Jun 2019
- GAPCOMB Workshop, Campelles
- Jun 2018
- DMD Conference, Sevilla [PDF]
- May 2018
- CANT Conference, New York [PDF]
- Sep 2017
- The Music of Numbers Conference, Madrid [PDF]
- Jun 2017
- Interactions with Combinatorics [PDF]
- Mar 2017
- FUB-TAU Workshop
Research seminar talks
- Feb 2023
- LIMDA Seminar, Barcelona [PDF]
- Apr 2022
- LIMDA Seminar, Barcelona
- Nov 2019
- Research Seminar Combinatorics, Berlin
- Nov 2019
- Combinatorics Research Seminar, Ilmenau
- May 2019
- PhD Seminar on Combinatorics, Games and Optimisation, London
View More / Less
- May 2019
- Combinatorial Theory Seminar, Oxford
- Feb 2019
- Extremal Set Theory Seminar, Budapest
- Dec 2018
- Research Seminar Combinatorics, Berlin
- Mar 2018
- GRAPHS at IMPA, Rio de Janeiro
- Dec 2017
- Research Seminar Combinatorics, Berlin
- Oct 2017
- LIMDA Seminar, Barcelona
- May 2017
- LIMDA Seminar, Barcelona
- Mar 2016
- LIMDA Seminar, Barcelona
- Feb 2016
- Research Seminar Combinatorics, Berlin
- Jan 2016
- Research Seminar Combinatorics, Berlin
- Dec 2015
- "What Is ...?" Seminar
- Oct 2015
- Research Seminar Combinatorics, Berlin
👨🏫 Teaching
- winter 2023
- Lecturer for Einführung in die Lineare und Kombinatorische Optimierung (ADM I) at TUB
- summer 2023
- Lecturer for Analysis I und Lineare Algebra für Ingenieurwissenschaften at TUB
- autumn 2018
- Assistant for Discrete Mathematics and Optimization at UPF
- autumn 2017
- Assistant for Discrete Mathematics and Optimization at UPF
- winter 2013
- Tutor for Analysis I (Lehramt) at FUB
- summer 2012
- Tutor for Analysis II (Lehramt) at FUB
- summer 2011
- Tutor for Analysis I (Lehramt) at FUB
📝 Organization
- 2023
- Organization of the Zuse Research Seminar
- 2023
- Member of the organising committee of the MATH+ Thematic Einstein Semester in Berlin
- Nov 2022
- Assisted in the organisation of the Festkolloquium for Martin Aigner in Berlin
- 2022
- Member of the organising committee of a Girls’ Day science outreach event in Berlin
- Sep 2021
- Member of the organising committee of the EUROCOMB conference in Barcelona
- 2021
- Member of the organising committee of a Girls’ Day science outreach event in Berlin
- Sep 2020
- Organised exercise session on Robust Machine Learning for CO@Work summer school in Berlin
- Oct 2017
- Member of the organising committee of the BMS-BGSMath Junior Meeting in Barcelona
- Jul 2016
- Assisted in the organisation of the Symposium Diskrete Mathematik in Berlin
- Jun 2016
- Assisted in the organisation of the Discrete Mathematics Days in Barcelona