Christoph Spiegel

I like using computational tools for theoretical mathematics. Lately, I have utilized flag algebras, semidefinite programming, and discrete optimization to improve some long-standing bounds in extremal combinatorics. Currently, I am exploring the areas of proof verification and assistance.

馃摤 Contact

office Room 3036 at ZIB
e-mail spiegel (at) zib.de
spiegel (at) campus.tu-berlin.de
homepage christophspiegel.berlin
languages German, English, and French

馃帗 Curriculum vitae

since 2022 deputy department head at ZIB
since Aug 2020 postdoctoral researcher at ZIB
Jun 2020 Ph.D. in Applied Mathematics at UPC
Mar 2015 M.Sc. in Mathematics at FUB
Dec 2012 B.Sc. in Mathematics at FUB

馃摑 Publications and preprints

Preprints

  1. Zimmer, M., Andoni, M., Spiegel, C., and Pokutta, S. (2023). PERP: Rethinking the Prune-Retrain Paradigm in the Era of LLMs. [arXiv] [code]
    [BibTeX]
    @misc{zasp_perp_23,
      archiveprefix = {arXiv},
      eprint = {2312.15230},
      primaryclass = {cs.LG},
      year = {2023},
      author = {Zimmer, Max and Andoni, Megi and Spiegel, Christoph and Pokutta, Sebastian},
      title = {PERP: Rethinking the Prune-Retrain Paradigm in the Era of LLMs},
      code = {https://github.com/ZIB-IOL/PERP}
    }
  2. Zimmer, M., Spiegel, C., and Pokutta, S. (2022). Compression-aware Training of Neural Networks Using Frank-Wolfe. [arXiv]
    [BibTeX]
    @misc{zsp_deepsparsefw_22,
      archiveprefix = {arXiv},
      eprint = {2205.11921},
      primaryclass = {cs.LG},
      year = {2022},
      author = {Zimmer, Max and Spiegel, Christoph and Pokutta, Sebastian},
      title = {Compression-aware Training of Neural Networks Using Frank-Wolfe}
    }
  3. Combettes, C., Spiegel, C., and Pokutta, S. (2020). Projection-free Adaptive Gradients for Large-scale Optimization. [arXiv] [summary] [code]
    [BibTeX]
    @misc{csp_adafw_20,
      archiveprefix = {arXiv},
      eprint = {2009.14114},
      primaryclass = {math.OC},
      year = {2020},
      author = {Combettes, Cyrille and Spiegel, Christoph and Pokutta, Sebastian},
      title = {Projection-free Adaptive Gradients for Large-scale Optimization},
      code = {https://github.com/ZIB-IOL/StochasticFrankWolfe},
      summary = {https://pokutta.com/blog/research/2020/10/21/adasfw.html}
    }
  4. Pokutta, S., Spiegel, C., and Zimmer, M. (2020). Deep Neural Network Training with Frank-Wolfe. [arXiv] [summary] [code]
    [BibTeX]
    @misc{zsp_deepfw_20,
      archiveprefix = {arXiv},
      eprint = {2010.07243},
      primaryclass = {cs.LG},
      year = {2020},
      author = {Pokutta, Sebastian and Spiegel, Christoph and Zimmer, Max},
      title = {Deep Neural Network Training with Frank-Wolfe},
      code = {https://github.com/ZIB-IOL/StochasticFrankWolfe},
      summary = {https://pokutta.com/blog/research/2020/11/11/NNFW.html}
    }
  5. Salia, N., Spiegel, C., Tompkins, C., and Zamora, O. (2019). Independent Chains in Acyclic Posets. [arXiv]
    [BibTeX]
    @misc{sstz_poset_19,
      archiveprefix = {arXiv},
      eprint = {1912.03288},
      primaryclass = {math.CO},
      year = {2019},
      author = {Salia, Nika and Spiegel, Christoph and Tompkins, Casey and Zamora, Oscar},
      title = {Independent Chains in Acyclic Posets}
    }

Conference proceedings

  1. Kiem, A., Pokutta, S., and Spiegel, C. (2024). Categorification of Flag Algebras. Proceedings of Discrete Mathematics Days.
    [BibTeX]
    @inproceedings{kps_flagalgebracategory_24,
      year = {2024},
      booktitle = {Proceedings of Discrete Mathematics Days},
      author = {Kiem, Aldo and Pokutta, Sebastian and Spiegel, Christoph},
      title = {Categorification of Flag Algebras}
    }
  2. Kiem, A., Pokutta, S., and Spiegel, C. (2024). The 4-color Ramsey Multiplicity of Triangles. Proceedings of Discrete Mathematics Days. [arXiv] [code]
    [BibTeX]
    @inproceedings{kps_flagalgebrasymmetries_22,
      year = {2024},
      booktitle = {Proceedings of Discrete Mathematics Days},
      archiveprefix = {arXiv},
      eprint = {2312.08049},
      primaryclass = {math.CO},
      author = {Kiem, Aldo and Pokutta, Sebastian and Spiegel, Christoph},
      title = {The 4-color Ramsey Multiplicity of Triangles},
      code = {https://github.com/FordUniver/kps_trianglemult}
    }
  3. Mundinger, K., Pokutta, S., Spiegel, C., and Zimmer, M. (2024). Extending the Continuum of Six-Colorings. Proceedings of Discrete Mathematics Days. [arXiv]
    [BibTeX]
    @inproceedings{mpsz_hadwigernelsonspectrum_24:1,
      year = {2024},
      booktitle = {Proceedings of Discrete Mathematics Days},
      archiveprefix = {arXiv},
      eprint = {2404.05509},
      author = {Mundinger, Konrad and Pokutta, Sebastian and Spiegel, Christoph and Zimmer, Max},
      title = {Extending the Continuum of Six-Colorings}
    }
  4. 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]
    @inproceedings{zsp_modelsoup_23,
      year = {2024},
      booktitle = {Proceedings of International Conference on Learning Representations},
      archiveprefix = {arXiv},
      eprint = {2306.16788},
      primaryclass = {cs.LG},
      author = {Zimmer, Max and Spiegel, Christoph and Pokutta, Sebastian},
      title = {Sparse Model Soups: A Recipe for Improved Pruning Via Model Averaging}
    }
  5. Parczyk, O., Pokutta, S., Spiegel, C., and Szab贸, T. (2023). Fully Computer-assisted Proofs in Extremal Combinatorics. Proceedings of AAAI Conference on Artificial Intelligence. [arXiv] [slides] [code]
    [BibTeX]
    @inproceedings{ppss_ramsey_22,
      year = {2023},
      booktitle = {Proceedings of AAAI Conference on Artificial Intelligence},
      archiveprefix = {arXiv},
      eprint = {2206.04036},
      primaryclass = {math.CO},
      author = {Parczyk, Olaf and Pokutta, Sebastian and Spiegel, Christoph and Szab贸, Tibor},
      title = {Fully Computer-assisted Proofs in Extremal Combinatorics},
      code = {https://zenodo.org/record/6602512#.YyvFhi8Rr5g},
      slides = {https://pokutta.com/slides/20220705_DMD22_RamseyMultiplicity.pdf}
    }
  6. Ru茅, 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]
    @inproceedings{rs_radomult_23,
      year = {2023},
      booktitle = {Proceedings of European Conference on Combinatorics},
      archiveprefix = {arXiv},
      eprint = {2304.00400},
      primaryclass = {math.CO},
      author = {Ru茅, Juan Jos茅 and Spiegel, Christoph},
      title = {The Rado Multiplicity Problem in Vector Spaces Over Finite Fields},
      code = {https://github.com/FordUniver/rs_radomult_23}
    }
  7. 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]
    @inproceedings{zsp_retrain_21,
      year = {2023},
      booktitle = {Proceedings of International Conference on Learning Representations},
      archiveprefix = {arXiv},
      eprint = {2111.00843},
      primaryclass = {cs.LG},
      author = {Zimmer, Max and Spiegel, Christoph and Pokutta, Sebastian},
      title = {How I Learned to Stop Worrying and Love Retraining},
      code = {https://github.com/ZIB-IOL/BIMP}
    }
  8. Parczyk, O., Pokutta, S., Spiegel, C., and Szab贸, T. (2022). New Ramsey Multiplicity Bounds and Search Heuristics. Proceedings of Discrete Mathematics Days. [arXiv] [code]
    [BibTeX]
    @inproceedings{ppss_ramsey_22:1,
      year = {2022},
      booktitle = {Proceedings of Discrete Mathematics Days},
      archiveprefix = {arXiv},
      eprint = {2206.04036},
      primaryclass = {math.CO},
      author = {Parczyk, Olaf and Pokutta, Sebastian and Spiegel, Christoph and Szab贸, Tibor},
      title = {New Ramsey Multiplicity Bounds and Search Heuristics},
      code = {https://zenodo.org/record/6602512#.YyvFhi8Rr5g}
    }
  9. Ru茅, J. J., and Spiegel, C. (2018). On a Problem of S谩rk枚zy and S贸s for Multivariate Linear Forms. Proceedings of Discrete Mathematics Days. [arXiv]
    [BibTeX]
    @inproceedings{rs_sarkozysos_18:1,
      year = {2018},
      booktitle = {Proceedings of Discrete Mathematics Days},
      archiveprefix = {arXiv},
      eprint = {1802.07597},
      primaryclass = {math.CO},
      author = {Ru茅, Juan Jos茅 and Spiegel, Christoph},
      title = {On a Problem of S谩rk枚zy and S贸s for Multivariate Linear Forms}
    }
  10. Kusch, C., Ru茅, J. J., Spiegel, C., and Szab贸, T. (2017). Random Strategies Are Nearly Optimal for Generalized Van Der Waerden Games. Proceedings of European Conference on Combinatorics. [URL] [arXiv]
    [BibTeX]
    @inproceedings{krss_randomstrategy_17:1,
      year = {2017},
      booktitle = {Proceedings of European Conference on Combinatorics},
      url = {https://dmg.tuwien.ac.at/eurocomb2017/index.php/accepted-papers/},
      archiveprefix = {arXiv},
      eprint = {1711.07251},
      primaryclass = {math.CO},
      author = {Kusch, Christopher and Ru茅, Juan Jos茅 and Spiegel, Christoph and Szab贸, Tibor},
      title = {Random Strategies Are Nearly Optimal for Generalized Van Der Waerden Games}
    }

Full articles

  1. Mundinger, K., Pokutta, S., Spiegel, C., and Zimmer, M. (2024). Extending the Continuum of Six-Colorings. Geombinatorics Quarterly, XXXIV. [arXiv]
    [BibTeX]
    @article{mpsz_hadwigernelsonspectrum_24,
      year = {2024},
      journal = {Geombinatorics Quarterly},
      volume = {XXXIV},
      archiveprefix = {arXiv},
      eprint = {2404.05509},
      author = {Mundinger, Konrad and Pokutta, Sebastian and Spiegel, Christoph and Zimmer, Max},
      title = {Extending the Continuum of Six-Colorings}
    }
  2. Kam膷ev, 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]
    @article{ks_halesjewett_18,
      year = {2022},
      journal = {Electronic Journal of Combinatorics},
      volume = {29},
      number = {1},
      doi = {10.37236/9400},
      url = {https://combinatorics.org/ojs/index.php/eljc/article/view/v29i1p62},
      archiveprefix = {arXiv},
      eprint = {1811.04628},
      primaryclass = {math.CO},
      author = {Kam膷ev, Nina and Spiegel, Christoph},
      title = {Another Note on Intervals in the Hales-Jewett Theorem}
    }
  3. Cao-Labora, G., Ru茅, J. J., and Spiegel, C. (2021-10). An Erd艖s-Fuchs Theorem for Ordered Representation Functions. Ramanujan Journal, 56, 183鈥2091. DOI: 10.1007/s11139-020-00326-2 [URL] [arXiv]
    [BibTeX]
    @article{crs_erdosfuchs_19,
      year = {2021-10},
      journal = {Ramanujan Journal},
      volume = {56},
      pages = {183-2091},
      doi = {10.1007/s11139-020-00326-2},
      url = {https://link.springer.com/article/10.1007/s11139-020-00326-2},
      archiveprefix = {arXiv},
      eprint = {1911.12313},
      primaryclass = {math.NT},
      author = {Cao-Labora, Gonzalo and Ru茅, Juan Jos茅 and Spiegel, Christoph},
      title = {An Erd艖s-Fuchs Theorem for Ordered Representation Functions}
    }
  4. Fabian, D., Ru茅, J. J., and Spiegel, C. (2021-08). On Strong Infinite Sidon and B鈧 Sets and Random Sets of Integers. Journal of Combinatorial Theory, Series A, 182. DOI: 10.1016/j.jcta.2021.105460 [URL] [arXiv]
    [BibTeX]
    @article{frs_sidon_19,
      year = {2021-08},
      journal = {Journal of Combinatorial Theory, Series A},
      volume = {182},
      doi = {10.1016/j.jcta.2021.105460},
      url = {https://sciencedirect.com/science/article/abs/pii/S0097316521000595},
      archiveprefix = {arXiv},
      eprint = {1911.13275},
      primaryclass = {math.CO},
      author = {Fabian, David and Ru茅, Juan Jos茅 and Spiegel, Christoph},
      title = {On Strong Infinite Sidon and B鈧 Sets and Random Sets of Integers}
    }
  5. Corsten, J., Mond, A., Pokrovskiy, A., Spiegel, C., and Szab贸, 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]
    @article{cmpss_oddcyclegame_19,
      year = {2020-10},
      journal = {European Journal of Combinatorics},
      volume = {89},
      doi = {10.1016/j.ejc.2020.103140},
      url = {https://sciencedirect.com/science/article/abs/pii/S0195669820300615},
      archiveprefix = {arXiv},
      eprint = {1906.04024},
      primaryclass = {math.CO},
      author = {Corsten, Jan and Mond, Adva and Pokrovskiy, Alexey and Spiegel, Christoph and Szab贸, Tibor},
      title = {On the Odd Cycle Game and Connected Rules}
    }
  6. Candela, P., Serra, O., and Spiegel, C. (2020). A Step Beyond Fre沫man鈥檚 Theorem for Set Addition Modulo a Prime. Journal De Th茅orie Des Nombres De Bordeaux, 32(1), 275鈥289. DOI: 10.5802/jtnb.1122 [URL] [arXiv]
    [BibTeX]
    @article{css_freiman_18,
      year = {2020},
      journal = {Journal de Th茅orie des Nombres de Bordeaux},
      volume = {32},
      number = {1},
      pages = {275-289},
      doi = {10.5802/jtnb.1122},
      url = {https://jtnb.centre-mersenne.org/item/JTNB_2020__32_1_275_0/},
      archiveprefix = {arXiv},
      eprint = {1805.12374},
      primaryclass = {math.CO},
      author = {Candela, Pablo and Serra, Oriol and Spiegel, Christoph},
      title = {A Step Beyond Fre沫man's Theorem for Set Addition Modulo a Prime}
    }
  7. Ru茅, J. J., and Spiegel, C. (2020). On a Problem of S谩rk枚zy and S贸s for Multivariate Linear Forms. Revista Matem谩tica Iberoamericana, 36(7), 2107鈥2119. DOI: 10.4171/RMI/1193 [URL] [arXiv]
    [BibTeX]
    @article{rs_sarkozysos_18,
      year = {2020},
      journal = {Revista Matem谩tica Iberoamericana},
      volume = {36},
      number = {7},
      pages = {2107-2119},
      doi = {10.4171/RMI/1193},
      url = {https://ems.press/journals/rmi/articles/16818},
      archiveprefix = {arXiv},
      eprint = {1802.07597},
      primaryclass = {math.CO},
      author = {Ru茅, Juan Jos茅 and Spiegel, Christoph},
      title = {On a Problem of S谩rk枚zy and S贸s for Multivariate Linear Forms}
    }
  8. Kusch, C., Ru茅, J. J., Spiegel, C., and Szab贸, T. (2019-09). On the Optimality of the Uniform Random Strategy. Random Structures & Algorithms, 55(2), 371鈥401. DOI: 10.1002/rsa.20829 [URL] [arXiv]
    [BibTeX]
    @article{krss_randomstrategy_17,
      year = {2019-09},
      journal = {Random Structures & Algorithms},
      volume = {55},
      number = {2},
      pages = {371-401},
      doi = {10.1002/rsa.20829},
      url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/rsa.20829},
      archiveprefix = {arXiv},
      eprint = {1711.07251},
      primaryclass = {math.CO},
      author = {Kusch, Christopher and Ru茅, Juan Jos茅 and Spiegel, Christoph and Szab贸, Tibor},
      title = {On the Optimality of the Uniform Random Strategy}
    }
  9. Fre沫man, G. A., Serra, O., and Spiegel, C. (2019). Additive Volume of Sets Contained in Few Arithmetic Progressions. INTEGERS, 19. [URL] [arXiv]
    [BibTeX]
    @article{fss_additivevolume_18,
      year = {2019},
      journal = {INTEGERS},
      volume = {19},
      url = {https://math.colgate.edu/~integers/t34/t34.mail.html},
      archiveprefix = {arXiv},
      eprint = {1808.08455},
      primaryclass = {math.NT},
      author = {Fre沫man, Gregory A. and Serra, Oriol and Spiegel, Christoph},
      title = {Additive Volume of Sets Contained in Few Arithmetic Progressions}
    }
  10. Ru茅, J. J., Spiegel, C., and Zumalac谩rregui, A. (2018). Threshold Functions and Poisson Convergence for Systems of Equations in Random Sets. Mathematische Zeitschrift, 288, 333鈥360. DOI: 10.1007/s00209-017-1891-2 [URL] [arXiv]
    [BibTeX]
    @article{rsz_threshold_12,
      year = {2018},
      journal = {Mathematische Zeitschrift},
      month = feb,
      volume = {288},
      pages = {333-360},
      doi = {10.1007/s00209-017-1891-2},
      url = {https://link.springer.com/article/10.1007/s00209-017-1891-2},
      archiveprefix = {arXiv},
      eprint = {1212.5496},
      primaryclass = {math.CO},
      author = {Ru茅, Juan Jos茅 and Spiegel, Christoph and Zumalac谩rregui, Ana},
      title = {Threshold Functions and Poisson Convergence for Systems of Equations in Random Sets}
    }
  11. 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]
    @article{spiegel_supersaturation_17,
      year = {2017},
      journal = {Electronic Journal of Combinatorics},
      volume = {24},
      number = {3},
      doi = {10.37236/6730},
      url = {https://combinatorics.org/ojs/index.php/eljc/article/view/v24i3p38},
      archiveprefix = {arXiv},
      eprint = {1701.01631},
      primaryclass = {math.CO},
      author = {Spiegel, Christoph},
      title = {A Note on Sparse Supersaturation and Extremal Results for Linear Homogeneous Systems}
    }

馃敩 Projects

LEAN on Me: Transforming Mathematics Through Formal Verification, Improved Tactics, and Machine Learning

Formal proof verification can both ensure proof correctness and provide new tools and insights to mathematicians. The goals of this project include creating resources for students and researchers, verifying relevant results, improving proof tactics, and exploring Machine Learning approaches.

MATH+ AA5-9
Jan 2024 to Dec 2025
4

Scaling Up Flag Algebras in Combinatorics

This project aims to obtain new bounds in Extremal Combinatorics through an application of flag algebras. The goal is to both improve the underlying computational aspects for existing problems as well as to further develop the theory of flag algebras to extend it to new areas of application.

MATH+ EF1-21
Oct 2022 to Sep 2025
3
3

Learning Extremal Structures in Combinatorics

Extremal Combinatorics focuses on the maximum or minimum sizes of discrete structures with specific properties, posing significant challenges due to their complexity. Traditional computational approaches often fail due to exponential growth in search spaces, but recent AI advancements, especially in Reinforcement Learning, offer new potential. Applying these AI methods could provide insights into combinatorial problems while also enhancing the understanding of AI techniques in complex, sparse reward environments.

MATH+ EF1-12
Jan 2021 to May 2024
4
9

Adaptive Algorithms Through Machine Learning: Exploiting Interactions in Integer Programming

The performance of modern mixed-integer program solvers is highly dependent on a number of interdependent individual components. Using tools from machine learning, we intend to develop an integrated framework that is able to capture interactions of individual decisions made in these components with the ultimate goal to improve performance.

MATH+ EF1-9
Jan 2021 to Dec 2022
5
3

馃挰 Talks and posters

Conference and workshop talks

Jul 2024
Extending the Continuum of Six-Colorings, DMD Conference, Alcal谩 de Henares
Oct 2023
The Role of Machine Learning for Mathematics, BMS RTA 8 - Practical Course, Berlin [PDF]
Aug 2023
The Rado Multiplicity Problem in Vector Spaces Over Finite Fields, 12th EuroComb Conference, Prague [PDF]
Aug 2023
Computational Challenges in Flag Algebra Proofs, ICIAM 2023 Minisymposium: Advances in Optimization I, Tokyo [PDF]
Aug 2023
Flag Algebras in Additive Combinatorics, 5th DOxML Conference, Tokyo [PDF]
View More / Less
Jun 2023
Towards Flag Algebras in Additive Combinatorics, FoCM 2023 Workshop I.3 Workshop, Paris [PDF]
May 2023
Towards Flag Algebras in Additive Combinatorics, CANT Conference, New York [PDF]
Mar 2023
Computer-assisted Proofs in Extremal Combinatorics, Optimization and ML Workshop, Waischenfeld [PDF]
Feb 2023
Fully Computer-assisted Proofs in Extremal Combinatorics, 37th AAAI Conference, Washington, DC [PDF]
Jan 2023
Fully Computer-assisted Proof in Extremal Combinatorics, Aussois Workshop, Aussois [PDF]
Dec 2022
Leveraging Combinatorial Symmetries in Flag Algebra-based SDP Formulations, Recent Advances in Optimization Workshop, Toronto [PDF]
Sep 2022
Proofs in Extremal Combinatorics Through Optimization, 6th RIKEN-MODAL Workshop, Tokyo / Fukuoka [PDF]
Jul 2022
New Ramsey Multiplicity Bounds and Search Heuristics, DMD Conference, Santander [PDF]
Jun 2019
Odd Cycle Games and Connected Rules, 36th Postgraduate Combinatorial Conference, Oxford [PDF]
Jun 2019
GAPCOMB Workshop, Campelles
Jun 2018
On a Problem of S谩rk枚zy and S贸s for Multivariate Linear Forms, DMD Conference, Sevilla [PDF]
May 2018
Going Beyond 2.4 in Freiman's 2.4k-theorem, CANT Conference, New York [PDF]
Sep 2017
Rado Positional Games, The Music of Numbers Conference, Madrid [PDF]
Jun 2017
Generalized Positional Van Der Waerden Games, Interactions with Combinatorics [PDF]
Mar 2017
FUB-TAU Workshop

Research seminar talks

Feb 2023
The Four-color Ramsey Multiplicity of Triangles, LIMDA Seminar, Barcelona [PDF]
Apr 2022
New Ramsey Multiplicity Bounds and Search Heuristics, LIMDA Seminar, Barcelona
Nov 2019
A Step Beyond Freiman's Theorem for Set Addition Modulo a Prime, Research Seminar Combinatorics, Berlin
Nov 2019
The Probabilistic Intuition in Positional Games, Research Seminar Large Networks and Random Graphs, Ilmenau
May 2019
Intervals in the Hales-Jewett Theorem, Seminar and PhD Seminar on Combinatorics, Games and Optimisation, London
View More / Less
May 2019
Intervals in the Hales-Jewett Theorem, Combinatorial Theory Seminar, Oxford
Feb 2019
Extremal Set Theory Seminar, Budapest
Dec 2018
Intervals in the Hales-Jewett Theorem, Research Seminar Combinatorics, Berlin
Mar 2018
Going Beyond 2.4 in Freiman's 2.4k-theorem, GRAPHS at IMPA, Rio de Janeiro
Dec 2017
On a Question of S谩rk枚zy and S贸s, Research Seminar Combinatorics, Berlin
Oct 2017
Sparse Supersaturation and Extremal Results for Linear Homogeneous Systems, LIMDA Seminar, Barcelona
May 2017
Random Strategies Are Nearly Optimal for Generalized Van Der Waerden Games, LIMDA Seminar, Barcelona
Mar 2016
Threshold Functions for Systems of Equations in Random Sets, LIMDA Seminar, Barcelona
Feb 2016
Van Der Waerden Games (II), Research Seminar Combinatorics, Berlin
Jan 2016
Van Der Waerden Games (I), Research Seminar Combinatorics, Berlin
Dec 2015
Discrete Fourier Analysis, "What Is ...?" Seminar [video]
Oct 2015
Threshold Functions for Systems of Equations in Random Sets, Research Seminar Combinatorics, Berlin

馃懆鈥嶐煆玊eaching

winter 2023
Lecturer for Einf眉hrung in die Lineare und Kombinatorische Optimierung (ADM I) at TUB
summer 2023
Lecturer for Analysis I und Lineare Algebra f眉r 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

馃摑 Organization and outreach

2024
Organization of the Zuse Research Seminar and Zuse Research Colloquium
2024
Creation and maintenance of the Berlin Math Seminars overview page
2024
Organization of ZIB40 events
2023
Organization of the Zuse Research Seminar
2023
Member of the organizing committee of the MATH+ Thematic Einstein Semester in Berlin
Nov 2022
Assisted in the organization of the Festkolloquium for Martin Aigner in Berlin
2022
Member of the organizing committee of a Girls鈥 Day science outreach event in Berlin
Sep 2021
Member of the organizing committee of the EUROCOMB conference in Barcelona
2021
Member of the organizing committee of a Girls鈥 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 organizing committee of the BMS-BGSMath Junior Meeting in Barcelona
Jul 2016
Assisted in the organization of the Symposium Diskrete Mathematik in Berlin
Jun 2016
Assisted in the organization of the Discrete Mathematics Days in Barcelona

馃巿 Miscellaneous

You can find some of my photography on instagram:

Some of my photography I also like designing the occasional conference poster: A collection of conference posters that I have made