Olaf Parczyk

My research interests are probabilistic and extremal combinatorics, Ramsey theory, and computational mathematics. I am mostly working on embedding type problems for graphs and usually they involve randomness in one way or the other.

📬 Contact

office
Room 3035 at ZIB
e-mail
homepage
page.mi.fu-berlin.de/parczyk/

🎓 Curriculum vitae

since 2024
Postdoc Representative at MATH+
since 2024
Substitute Professor at FUB
since 2024
Researcher at ZIB
since 2021
Member of MATH+
2021 to 2024
Researcher at FUB
2019 to 2021
Visiting Fellow at LSE
2018 to 2019
Researcher at Technische Universität Ilmenau
2014 to 2018
Researcher at JWGU
Dec 2017
Ph.D. in Mathematics at JWGU
Nov 2014
M.Sc. in Mathematics at FUB
Feb 2013
B.Sc. in Mathematics at FUB

đź“ť Publications and preprints

Preprints

  1. Díaz, A. E., Gupta, P., Cecchelli, D. M., Parczyk, O., and Sgueglia, A. (2024). Dirac’s Theorem for Graphs of Bounded Bandwidth. [arXiv]
    [BibTeX]
    @misc{2024_AlbertoEtAl_Diractheorembandwidth,
  archiveprefix = {arXiv},
  eprint = {2407.05889},
  primaryclass = {math.CO},
  year = {2024},
  author = {Díaz, Alberto Espuny and Gupta, Pranshu and Cecchelli, Domenico Mergoni and Parczyk, Olaf and Sgueglia, Amédeo},
  title = {Dirac's Theorem for Graphs of Bounded Bandwidth}
}
  2. Illingworth, F., Lang, R., MĂĽyesser, A., Parczyk, O., and Sgueglia, A. (2024). Spanning Spheres in Dirac Hypergraphs. [arXiv]
    [BibTeX]
    @misc{2024_FreddieEtAl_Spanningspheresdirac,
  archiveprefix = {arXiv},
  eprint = {2407.06275},
  primaryclass = {math.CO},
  year = {2024},
  author = {Illingworth, Freddie and Lang, Richard and Müyesser, Alp and Parczyk, Olaf and Sgueglia, Amédeo},
  title = {Spanning Spheres in Dirac Hypergraphs}
}
  3. Kiem, A., Parczyk, O., and Spiegel, C. (2024). Forcing Graphs to Be Forcing. [arXiv]
    [BibTeX]
    @misc{2024_KiemParczykSpiegel_Forcing,
  archiveprefix = {arXiv},
  eprint = {2412.12904},
  primaryclass = {math.CO},
  year = {2024},
  author = {Kiem, Aldo and Parczyk, Olaf and Spiegel, Christoph},
  title = {Forcing Graphs to Be Forcing}
}
  4. Parczyk, O., and Spiegel, C. (2024). An Unsure Note on an Un-Schur Problem. [arXiv]
    [BibTeX]
    @misc{2024_ParczykSpiegel_UnSchur,
  archiveprefix = {arXiv},
  eprint = {2410.22024},
  primaryclass = {math.CO},
  year = {2024},
  author = {Parczyk, Olaf and Spiegel, Christoph},
  title = {An Unsure Note on an Un-Schur Problem}
}
  5. Böttcher, J., Frankl, N., Cecchelli, D. M., Skokan, J., and Parczyk, O. (2023). Graphs with Large Minimum Degree and No Small Odd Cycles Are 3-colourable. [arXiv]
    [BibTeX]
    @misc{2023_BoettcherEtAl_Graphs3colourable,
  archiveprefix = {arXiv},
  eprint = {2302.01875},
  primaryclass = {math.CO},
  year = {2023},
  author = {Böttcher, Julia and Frankl, Nóra and Cecchelli, Domenico Mergoni and Skokan, Jozef and Parczyk, Olaf},
  title = {Graphs with Large Minimum Degree and No Small Odd Cycles Are 3-colourable}
}
  6. Mattos, L., Cecchelli, D. M., and Parczyk, O. (2023). On Product Schur Triples in the Integers. [arXiv]
    [BibTeX]
    @misc{2023_MattosDomenicoParczyk_Productschurtriples,
  archiveprefix = {arXiv},
  eprint = {2311.18796},
  primaryclass = {math.CO},
  year = {2023},
  author = {Mattos, LetĂ­cia and Cecchelli, Domenico Mergoni and Parczyk, Olaf},
  title = {On Product Schur Triples in the Integers}
}

Conference proceedings

  1. Parczyk, O., Pokutta, S., Spiegel, C., and SzabĂł, T. (2023). Fully Computer-assisted Proofs in Extremal Combinatorics. Proceedings of the AAAI Conference on Artificial Intelligence. DOI: 10.1609/aaai.v37i10.26470 [URL] [arXiv] [code]
    [BibTeX]
    @inproceedings{2022_ParczykPokuttaSpiegelSzabo_Ramseymultiplicityheuristics:1,
  year = {2023},
  booktitle = {Proceedings of the AAAI Conference on Artificial Intelligence},
  doi = {10.1609/aaai.v37i10.26470},
  url = {https://ojs.aaai.org/index.php/AAAI/article/view/26470},
  archiveprefix = {arXiv},
  eprint = {2206.04036},
  primaryclass = {math.CO},
  author = {Parczyk, Olaf and Pokutta, Sebastian and Spiegel, Christoph and SzabĂł, Tibor},
  title = {Fully Computer-assisted Proofs in Extremal Combinatorics},
  code = {https://zenodo.org/record/6602512#.YyvFhi8Rr5g}
}
  2. Parczyk, O., Pokutta, S., Spiegel, C., and SzabĂł, T. (2022). New Ramsey Multiplicity Bounds and Search Heuristics. Proceedings of the Discrete Mathematics Days. [arXiv] [code]
    [BibTeX]
    @inproceedings{2022_ParczykPokuttaSpiegelSzabo_Ramseymultiplicityheuristics:2,
  year = {2022},
  booktitle = {Proceedings of the Discrete Mathematics Days},
  archiveprefix = {arXiv},
  eprint = {2206.04036},
  primaryclass = {math.CO},
  author = {Parczyk, Olaf and Pokutta, Sebastian and Spiegel, Christoph and SzabĂł, Tibor},
  title = {New Ramsey Multiplicity Bounds and Search Heuristics},
  code = {https://zenodo.org/record/6602512#.YyvFhi8Rr5g}
}
  3. Böttcher, J., Sgueglia, A., Skokan, J., and Parczyk, O. (2021). Cycle Factors in Randomly Perturbed Graphs. Proceedings of the Latin American Algorithms, Graphs, and Optimization Symposium, 195, 404–411. DOI: 10.1016/j.procs.2021.11.049 [arXiv]
    [BibTeX]
    @inproceedings{2021_BoettcherAmedeoJozefParczyk_CyclefactorsPerturbedgraphs,
  year = {2021},
  booktitle = {Proceedings of the Latin American Algorithms, Graphs, and Optimization Symposium},
  volume = {195},
  pages = {404-411},
  doi = {10.1016/j.procs.2021.11.049},
  archiveprefix = {arXiv},
  eprint = {2103.06136},
  primaryclass = {math.CO},
  author = {Böttcher, Julia and Sgueglia, Amédeo and Skokan, Jozef and Parczyk, Olaf},
  title = {Cycle Factors in Randomly Perturbed Graphs}
}
  4. Clemens, D., Hamann, F., Mogge, Y., and Parczyk, O. (2021). Waiter-Client Games on Randomly Perturbed Graphs. Proceedings of the European Conference on Combinatorics, Graph Theory and Applications, 14, 397–403. DOI: 10.1007/978-3-030-83823-2_62
    [BibTeX]
    @inproceedings{2021_DennisFabianYannickParczyk_Waiterclientgames,
  year = {2021},
  booktitle = {Proceedings of the European Conference on Combinatorics, Graph Theory and Applications},
  volume = {14},
  pages = {397-403},
  doi = {10.1007/978-3-030-83823-2_62},
  author = {Clemens, Dennis and Hamann, Fabian and Mogge, Yannick and Parczyk, Olaf},
  title = {Waiter-Client Games on Randomly Perturbed Graphs}
}
  5. Böttcher, J., Sgueglia, A., Skokan, J., and Parczyk, O. (2021). The Square of a Hamilton Cycle in Randomly Perturbed Graphs. Proceedings of the European Conference on Combinatorics, Graph Theory and Applications, 14, 644–650. DOI: 10.1007/978-3-030-83823-2_103 [arXiv]
    [BibTeX]
    @inproceedings{2024_BoettcherAmedeoJozefParczyk_Hamiltoncycleperturbation:1,
  year = {2021},
  booktitle = {Proceedings of the European Conference on Combinatorics, Graph Theory and Applications},
  volume = {14},
  pages = {644-650},
  doi = {10.1007/978-3-030-83823-2_103},
  archiveprefix = {arXiv},
  eprint = {2202.05215},
  primaryclass = {math.CO},
  author = {Böttcher, Julia and Sgueglia, Amédeo and Skokan, Jozef and Parczyk, Olaf},
  title = {The Square of a Hamilton Cycle in Randomly Perturbed Graphs}
}
  6. Parczyk, O. (2019). Almost Spanning Universality in Random Graphs. Proceedings of the European Conference on Combinatorics, Graph Theory and Applications, 88(3), 997–1002. [URL]
    [BibTeX]
    @inproceedings{2019_Parczyk_Almostspanninguniversality,
  year = {2019},
  booktitle = {Proceedings of the European Conference on Combinatorics, Graph Theory and Applications},
  volume = {88},
  number = {3},
  pages = {997-1002},
  url = {http://www.iam.fmph.uniba.sk/amuc/ojs/index.php/amuc/article/view/1240/753},
  author = {Parczyk, Olaf},
  title = {Almost Spanning Universality in Random Graphs}
}
  7. Hubai, T., Král, D., Person, Y., and Parczyk, O. (2019). More Non-bipartite Forcing Pairs. Proceedings of the European Conference on Combinatorics, Graph Theory and Applications, 88(3), 819–825. [URL] [arXiv]
    [BibTeX]
    @inproceedings{2019_TamasDanPersonParczyk_Nonbipartiteforcing,
  year = {2019},
  booktitle = {Proceedings of the European Conference on Combinatorics, Graph Theory and Applications},
  volume = {88},
  number = {3},
  pages = {819-825},
  url = {http://www.iam.fmph.uniba.sk/amuc/ojs/index.php/amuc/article/view/1279/772},
  archiveprefix = {arXiv},
  eprint = {1906.04089},
  primaryclass = {math.CO},
  author = {Hubai, Tamas and Král, Dan and Person, Yury and Parczyk, Olaf},
  title = {More Non-bipartite Forcing Pairs}
}
  8. Berger, S., Kohayakawa, Y., Maesaka, G. S., Martins, T., Mendonça, W., Mota, G. O., and Parczyk, O. (2019). The Size-Ramsey Number of Powers of Bounded Degree Trees. Proceedings of the European Conference on Combinatorics, Graph Theory and Applications, 88(3), 451–456. [URL] [arXiv]
    [BibTeX]
    @inproceedings{2021_SrenEtAl_Sizeramseytrees:1,
  year = {2019},
  booktitle = {Proceedings of the European Conference on Combinatorics, Graph Theory and Applications},
  volume = {88},
  number = {3},
  pages = {451-456},
  url = {http://www.iam.fmph.uniba.sk/amuc/ojs/index.php/amuc/article/view/1281/679},
  archiveprefix = {arXiv},
  eprint = {1907.03466},
  primaryclass = {math.CO},
  author = {Berger, Sören and Kohayakawa, Yoshiharu and Maesaka, Giulia S. and Martins, Taísa and Mendonça, Walner and Mota, Guilherme O. and Parczyk, Olaf},
  title = {The Size-Ramsey Number of Powers of Bounded Degree Trees}
}
  9. Barros, G. F., Cavalar, B. P., Mota, G. O., and Parczyk, O. (2019). Anti-Ramsey Threshold of Cycles for Sparse Graphs. Proceedings of the Latin American Algorithms, Graphs, and Optimization Symposium, 346, 89–98. DOI: 10.1016/j.entcs.2019.08.009 [arXiv]
    [BibTeX]
    @inproceedings{2022_BarrosCavalarMotaParczyk_AntiramseythresholdCyclesSparsegraphs:1,
  year = {2019},
  booktitle = {Proceedings of the Latin American Algorithms, Graphs, and Optimization Symposium},
  volume = {346},
  pages = {89-98},
  doi = {10.1016/j.entcs.2019.08.009},
  archiveprefix = {arXiv},
  eprint = {2006.02079},
  primaryclass = {math.CO},
  author = {Barros, Gabriel F. and Cavalar, Bruno P. and Mota, Guilherme O. and Parczyk, Olaf},
  title = {Anti-Ramsey Threshold of Cycles for Sparse Graphs}
}
  10. Allen, P., Koch, C., Person, Y., and Parczyk, O. (2018). Finding Tight Hamilton Cycles in Random Hypergraphs Faster. Proceedings of the LATIN 2018: Theoretical Informatics, 10807. DOI: 10.1007/978-3-319-77404-6_3 [arXiv]
    [BibTeX]
    @inproceedings{2021_PeterChristophPersonParczyk_HamiltoncyclesHypergraphs:1,
  year = {2018},
  booktitle = {Proceedings of the LATIN 2018: Theoretical Informatics},
  volume = {10807},
  doi = {10.1007/978-3-319-77404-6_3},
  archiveprefix = {arXiv},
  eprint = {1710.08988},
  primaryclass = {math.CO},
  author = {Allen, Peter and Koch, Christoph and Person, Yury and Parczyk, Olaf},
  title = {Finding Tight Hamilton Cycles in Random Hypergraphs Faster}
}
  11. Böttcher, J., Montgomery, R., Parczyk, O., and Person, Y. (2017). Embedding Spanning Bounded Degree Graphs in Randomly Perturbed Graphs. Proceedings of the European Conference on Combinatorics, Graph Theory and Applications, 61, 155–161. DOI: 10.1016/j.endm.2017.06.033 [arXiv]
    [BibTeX]
    @inproceedings{2019_BoettcherMontgomeryParczykPerson_Spanninggraphsembedding:1,
  year = {2017},
  booktitle = {Proceedings of the European Conference on Combinatorics, Graph Theory and Applications},
  volume = {61},
  pages = {155-161},
  doi = {10.1016/j.endm.2017.06.033},
  archiveprefix = {arXiv},
  eprint = {1802.04603},
  primaryclass = {math.CO},
  author = {Böttcher, Julia and Montgomery, Richard and Parczyk, Olaf and Person, Yury},
  title = {Embedding Spanning Bounded Degree Graphs in Randomly Perturbed Graphs}
}
  12. Person, Y., and Parczyk, O. (2015). Spanning Structures and Universality in Sparse Hypergraphs. Proceedings of the European Conference on Combinatorics, Graph Theory and Applications, 49, 611–619. DOI: 10.1016/j.endm.2015.06.083 [arXiv]
    [BibTeX]
    @inproceedings{2016_PersonParczyk_Spanninguniversality:1,
  year = {2015},
  booktitle = {Proceedings of the European Conference on Combinatorics, Graph Theory and Applications},
  volume = {49},
  pages = {611-619},
  doi = {10.1016/j.endm.2015.06.083},
  archiveprefix = {arXiv},
  eprint = {1504.02243},
  primaryclass = {math.CO},
  author = {Person, Yury and Parczyk, Olaf},
  title = {Spanning Structures and Universality in Sparse Hypergraphs}
}

Full articles

  1. Parczyk, O., Pokutta, S., Spiegel, C., and SzabĂł, T. (2024). New Ramsey Multiplicity Bounds and Search Heuristics. Foundations of Computational Mathematics. DOI: 10.1007/s10208-024-09675-6 [arXiv] [code]
    [BibTeX]
    @article{2022_ParczykPokuttaSpiegelSzabo_Ramseymultiplicityheuristics,
  year = {2024},
  journal = {Foundations of Computational Mathematics},
  doi = {10.1007/s10208-024-09675-6},
  archiveprefix = {arXiv},
  eprint = {2206.04036},
  primaryclass = {math.CO},
  author = {Parczyk, Olaf and Pokutta, Sebastian and Spiegel, Christoph and SzabĂł, Tibor},
  title = {New Ramsey Multiplicity Bounds and Search Heuristics},
  code = {https://zenodo.org/record/6602512#.YyvFhi8Rr5g}
}
  2. Böttcher, J., Sgueglia, A., Skokan, J., and Parczyk, O. (2024). The Square of a Hamilton Cycle in Randomly Perturbed Graphs. Random Structures & Algorithms, 65(2), 342–368. DOI: 10.1002/rsa.21215 [arXiv]
    [BibTeX]
    @article{2024_BoettcherAmedeoJozefParczyk_Hamiltoncycleperturbation,
  year = {2024},
  journal = {Random Structures & Algorithms},
  volume = {65},
  number = {2},
  pages = {342-368},
  doi = {10.1002/rsa.21215},
  archiveprefix = {arXiv},
  eprint = {2202.05215},
  primaryclass = {math.CO},
  author = {Böttcher, Julia and Sgueglia, Amédeo and Skokan, Jozef and Parczyk, Olaf},
  title = {The Square of a Hamilton Cycle in Randomly Perturbed Graphs}
}
  3. Hahn-Klimroth, M., Person, Y., and Parczyk, O. (2024). Minimum Degree Conditions for Containing an R-regular R-connected Subgraph. European Journal of Combinatorics, 118, 103940. DOI: 10.1016/j.ejc.2024.103940 [arXiv]
    [BibTeX]
    @article{2024_MaxPersonParczyk_Minimumdegreesubgraph,
  year = {2024},
  journal = {European Journal of Combinatorics},
  volume = {118},
  pages = {103940},
  doi = {10.1016/j.ejc.2024.103940},
  archiveprefix = {arXiv},
  eprint = {2108.07601},
  primaryclass = {math.CO},
  author = {Hahn-Klimroth, Max and Person, Yury and Parczyk, Olaf},
  title = {Minimum Degree Conditions for Containing an R-regular R-connected Subgraph}
}
  4. Allen, P., Pfenninger, V., and Parczyk, O. (2024). Resilience for Tight Hamiltonicity. Combinatorial Theory, 4, #9. DOI: 10.5070/C64163846 [arXiv]
    [BibTeX]
    @article{2024_PeterVincentParczyk_Resiliencehamiltonicity,
  year = {2024},
  journal = {Combinatorial Theory},
  volume = {4},
  pages = {#9},
  doi = {10.5070/C64163846},
  archiveprefix = {arXiv},
  eprint = {2105.04513},
  primaryclass = {math.CO},
  author = {Allen, Peter and Pfenninger, Vincent and Parczyk, Olaf},
  title = {Resilience for Tight Hamiltonicity}
}
  5. Gupta, P., Hamann, F., Müyesser, A., Sgueglia, A., and Parczyk, O. (2023). A General Approach to Transversal Versions of Dirac-type Theorems. Bulletin of the London Mathematical Society, 55, 2817–2839. DOI: 10.1112/blms.12896 [arXiv]
    [BibTeX]
    @article{2023_PranshuEtAl_Transversaldirac,
  year = {2023},
  journal = {Bulletin of the London Mathematical Society},
  volume = {55},
  pages = {2817-2839},
  doi = {10.1112/blms.12896},
  archiveprefix = {arXiv},
  eprint = {2209.09289},
  primaryclass = {math.CO},
  author = {Gupta, Pranshu and Hamann, Fabian and Müyesser, Alp and Sgueglia, Amédeo and Parczyk, Olaf},
  title = {A General Approach to Transversal Versions of Dirac-type Theorems}
}
  6. Kohayakawa, Y., Mota, G. O., Schnitzer, J., and Parczyk, O. (2023). Anti-Ramsey Threshold of Complete Graphs for Sparse Graphs. Discrete Mathematics, 346(5), 113343. DOI: 10.1016/j.disc.2023.113343 [arXiv]
    [BibTeX]
    @article{2023_YoshiharuMotaJakobParczyk_Antiramseythreshold,
  year = {2023},
  journal = {Discrete Mathematics},
  volume = {346},
  number = {5},
  pages = {113343},
  doi = {10.1016/j.disc.2023.113343},
  archiveprefix = {arXiv},
  eprint = {1902.00306},
  primaryclass = {math.CO},
  author = {Kohayakawa, Yoshiharu and Mota, Guilherme O. and Schnitzer, Jakob and Parczyk, Olaf},
  title = {Anti-Ramsey Threshold of Complete Graphs for Sparse Graphs}
}
  7. Barros, G. F., Cavalar, B. P., Mota, G. O., and Parczyk, O. (2022). Anti-Ramsey Threshold of Cycles for Sparse Graphs. Discrete Applied Mathematics, 323, 228–235. DOI: 10.1016/j.dam.2021.10.021 [arXiv]
    [BibTeX]
    @article{2022_BarrosCavalarMotaParczyk_AntiramseythresholdCyclesSparsegraphs,
  year = {2022},
  journal = {Discrete Applied Mathematics},
  volume = {323},
  pages = {228-235},
  doi = {10.1016/j.dam.2021.10.021},
  archiveprefix = {arXiv},
  eprint = {2006.02079},
  primaryclass = {math.CO},
  author = {Barros, Gabriel F. and Cavalar, Bruno P. and Mota, Guilherme O. and Parczyk, Olaf},
  title = {Anti-Ramsey Threshold of Cycles for Sparse Graphs}
}
  8. Böttcher, J., Sgueglia, A., Skokan, J., and Parczyk, O. (2022). Triangles in Randomly Perturbed Graphs. Combinatorics, Probability and Computing, 32(1), 91–121. DOI: 10.1017/S0963548322000153 [arXiv]
    [BibTeX]
    @article{2022_BoettcherAmedeoJozefParczyk_Randomgraphstriangles,
  year = {2022},
  journal = {Combinatorics, Probability and Computing},
  volume = {32},
  number = {1},
  pages = {91-121},
  doi = {10.1017/S0963548322000153},
  archiveprefix = {arXiv},
  eprint = {2011.07612},
  primaryclass = {math.CO},
  author = {Böttcher, Julia and Sgueglia, Amédeo and Skokan, Jozef and Parczyk, Olaf},
  title = {Triangles in Randomly Perturbed Graphs}
}
  9. Gebhard, O., Hahn-Klimroth, M., Penschuck, M., Rolvien, M., Scarlett, J., Tan, N., and Parczyk, O. (2022). Near Optimal Sparsity-constrained Group Testing: Improved Bounds. IEEE Transactions on Information Theory, 68(5), 3253–3280. DOI: 10.1109/TIT.2022.3141244 [arXiv]
    [BibTeX]
    @article{2022_OliverEtAl_Sparsitygrouptesting,
  year = {2022},
  journal = {IEEE Transactions on Information Theory},
  volume = {68},
  number = {5},
  pages = {3253-3280},
  doi = {10.1109/TIT.2022.3141244},
  archiveprefix = {arXiv},
  eprint = {2004.11860},
  primaryclass = {math.CO},
  author = {Gebhard, Oliver and Hahn-Klimroth, Max and Penschuck, Manuel and Rolvien, Maurice and Scarlett, Jonathan and Tan, Nelvin and Parczyk, Olaf},
  title = {Near Optimal Sparsity-constrained Group Testing: Improved Bounds}
}
  10. Clemens, D., Hamann, F., Mogge, Y., and Parczyk, O. (2021). Maker-Breaker Games on Randomly Perturbed Graphs. SIAM Journal on Discrete Mathematics, 35(4), 2734–2748. DOI: 10.1137/20M1385044 [arXiv]
    [BibTeX]
    @article{2021_DennisFabianYannickParczyk_Makerbreakergames,
  year = {2021},
  journal = {SIAM Journal on Discrete Mathematics},
  volume = {35},
  number = {4},
  pages = {2734-2748},
  doi = {10.1137/20M1385044},
  archiveprefix = {arXiv},
  eprint = {2009.14583},
  primaryclass = {math.CO},
  author = {Clemens, Dennis and Hamann, Fabian and Mogge, Yannick and Parczyk, Olaf},
  title = {Maker-Breaker Games on Randomly Perturbed Graphs}
}
  11. Han, J., Kohayakawa, Y., Letzter, S., Mota, G. O., and Parczyk, O. (2021). The Size-Ramsey Number of 3-uniform Tight Paths. Advances in Combinatorics, 5, 12pp. DOI: 10.19086/aic.24581 [arXiv]
    [BibTeX]
    @article{2021_JieEtAl_Sizeramseynumber,
  year = {2021},
  journal = {Advances in Combinatorics},
  volume = {5},
  pages = {12pp},
  doi = {10.19086/aic.24581},
  archiveprefix = {arXiv},
  eprint = {1907.08086},
  primaryclass = {math.CO},
  author = {Han, Jie and Kohayakawa, Yoshiharu and Letzter, Shoham and Mota, Guilherme O. and Parczyk, Olaf},
  title = {The Size-Ramsey Number of 3-uniform Tight Paths}
}
  12. Hahn-Klimroth, M., Maesaka, G. S., Mogge, Y., Mohr, S., and Parczyk, O. (2021). Random Perturbation of Sparse Graphs. The Electronic Journal of Combinatorics, 28(2), P2.26. DOI: 10.37236/9510 [arXiv]
    [BibTeX]
    @article{2021_MaxEtAl_Randomsparsegraphs,
  year = {2021},
  journal = {The Electronic Journal of Combinatorics},
  volume = {28},
  number = {2},
  pages = {P2.26},
  doi = {10.37236/9510},
  archiveprefix = {arXiv},
  eprint = {2004.04672},
  primaryclass = {math.CO},
  author = {Hahn-Klimroth, Max and Maesaka, Giulia S. and Mogge, Yannick and Mohr, Samuel and Parczyk, Olaf},
  title = {Random Perturbation of Sparse Graphs}
}
  13. Allen, P., Koch, C., Person, Y., and Parczyk, O. (2021). Finding Tight Hamilton Cycles in Random Hypergraphs Faster. Combinatorics, Probability and Computing, 30(2), 239–257. DOI: 10.1017/S0963548320000450 [arXiv]
    [BibTeX]
    @article{2021_PeterChristophPersonParczyk_HamiltoncyclesHypergraphs,
  year = {2021},
  journal = {Combinatorics, Probability and Computing},
  volume = {30},
  number = {2},
  pages = {239-257},
  doi = {10.1017/S0963548320000450},
  archiveprefix = {arXiv},
  eprint = {1710.08988},
  primaryclass = {math.CO},
  author = {Allen, Peter and Koch, Christoph and Person, Yury and Parczyk, Olaf},
  title = {Finding Tight Hamilton Cycles in Random Hypergraphs Faster}
}
  14. Berger, S., Kohayakawa, Y., Maesaka, G. S., Martins, T., Mendonça, W., Mota, G. O., and Parczyk, O. (2021). The Size-Ramsey Number of Powers of Bounded Degree Trees. Journal of the London Mathematical Society, 103(4), 1314–1332. DOI: 10.1112/jlms.12408 [arXiv]
    [BibTeX]
    @article{2021_SrenEtAl_Sizeramseytrees,
  year = {2021},
  journal = {Journal of the London Mathematical Society},
  volume = {103},
  number = {4},
  pages = {1314-1332},
  doi = {10.1112/jlms.12408},
  archiveprefix = {arXiv},
  eprint = {1907.03466},
  primaryclass = {math.CO},
  author = {Berger, Sören and Kohayakawa, Yoshiharu and Maesaka, Giulia S. and Martins, Taísa and Mendonça, Walner and Mota, Guilherme O. and Parczyk, Olaf},
  title = {The Size-Ramsey Number of Powers of Bounded Degree Trees}
}
  15. Böttcher, J., Montgomery, R., Parczyk, O., and Person, Y. (2020). Embedding Spanning Bounded Degree Graphs in Randomly Perturbed Graphs. Mathematika, 66(2), 422–447. DOI: 10.1112/mtk.12005 [URL] [arXiv]
    [BibTeX]
    @article{2019_BoettcherMontgomeryParczykPerson_Spanninggraphsembedding,
  year = {2020},
  journal = {Mathematika},
  volume = {66},
  number = {2},
  pages = {422-447},
  doi = {10.1112/mtk.12005},
  url = {https://londmathsoc.onlinelibrary.wiley.com/doi/abs/10.1112/mtk.12005},
  archiveprefix = {arXiv},
  eprint = {1802.04603},
  primaryclass = {math.CO},
  author = {Böttcher, Julia and Montgomery, Richard and Parczyk, Olaf and Person, Yury},
  title = {Embedding Spanning Bounded Degree Graphs in Randomly Perturbed Graphs}
}
  16. Parczyk, O., Elizer, O. B., Hefetz, D., Kronenberg, G., Shikelman, C., and Stojaković, M. (2020). Semi-random Graph Process. Random Structures & Algorithms, 56(3), 648–675. DOI: 10.1002/rsa.20887 [arXiv]
    [BibTeX]
    @article{2020_ParczykEtAl_Semirandomgraph,
  year = {2020},
  journal = {Random Structures & Algorithms},
  volume = {56},
  number = {3},
  pages = {648-675},
  doi = {10.1002/rsa.20887},
  archiveprefix = {arXiv},
  eprint = {1805.02259},
  primaryclass = {math.CO},
  author = {Parczyk, Olaf and Elizer, Omri Ben and Hefetz, Dan and Kronenberg, Gal and Shikelman, Clara and Stojaković, Miloš},
  title = {Semi-random Graph Process}
}
  17. Parczyk, O. (2020). 2-universality in Randomly Perturbed Graphs. European Journal of Combinatorics, 87, 103–118. DOI: 10.1016/j.ejc.2020.103118 [arXiv]
    [BibTeX]
    @article{2020_Parczyk_2universalityRandomlyperturbedgraphs,
  year = {2020},
  journal = {European Journal of Combinatorics},
  volume = {87},
  pages = {103-118},
  doi = {10.1016/j.ejc.2020.103118},
  archiveprefix = {arXiv},
  eprint = {1902.01823},
  primaryclass = {math.CO},
  author = {Parczyk, Olaf},
  title = {2-universality in Randomly Perturbed Graphs}
}
  18. Böttcher, J., Montgomery, R., Person, Y., Parczyk, O., Han, J., and Kohayakawa, Y. (2019). Universality of Bounded Degree Spanning Trees in Randomly Perturbed Graphs. Random Structures & Algorithms, 55(4), 854–864. DOI: 10.1002/rsa.20850 [arXiv]
    [BibTeX]
    @article{2019_BoettcherEtAl_Boundeddegreespanningtrees,
  year = {2019},
  journal = {Random Structures & Algorithms},
  volume = {55},
  number = {4},
  pages = {854-864},
  doi = {10.1002/rsa.20850},
  archiveprefix = {arXiv},
  eprint = {1802.04707},
  primaryclass = {math.CO},
  author = {Böttcher, Julia and Montgomery, Richard and Person, Yury and Parczyk, Olaf and Han, Jie and Kohayakawa, Yoshiharu},
  title = {Universality of Bounded Degree Spanning Trees in Randomly Perturbed Graphs}
}
  19. Person, Y., and Parczyk, O. (2016). Spanning Structures and Universality in Sparse Hypergraphs. Random Structures & Algorithms, 49(4), 819–844. DOI: 10.1002/rsa.20690 [arXiv]
    [BibTeX]
    @article{2016_PersonParczyk_Spanninguniversality,
  year = {2016},
  journal = {Random Structures & Algorithms},
  volume = {49},
  number = {4},
  pages = {819-844},
  doi = {10.1002/rsa.20690},
  archiveprefix = {arXiv},
  eprint = {1504.02243},
  primaryclass = {math.CO},
  author = {Person, Yury and Parczyk, Olaf},
  title = {Spanning Structures and Universality in Sparse Hypergraphs}
}
  20. Hetterich, S., Person, Y., and Parczyk, O. (2016). On Universal Hypergraphs. The Electronic Journal of Combinatorics, 23(4), P4.28. DOI: 10.37236/5562 [arXiv]
    [BibTeX]
    @article{2016_SamuelPersonParczyk_Universalhypergraphs,
  year = {2016},
  journal = {The Electronic Journal of Combinatorics},
  volume = {23},
  number = {4},
  pages = {P4.28},
  doi = {10.37236/5562},
  archiveprefix = {arXiv},
  eprint = {1509.03983},
  primaryclass = {math.CO},
  author = {Hetterich, Samuel and Person, Yury and Parczyk, Olaf},
  title = {On Universal Hypergraphs}
}

🔬 Projects

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
13

đź’¬ Talks and posters

Conference and workshop talks

Jun 2023
New Ramsey Multiplicity Bounds and Search Heuristics
FoCM 2023 Workshop I.3: Graph Theory and Combinatorics, Paris
May 2023
Graphs with Large Minimum Degree and No Small Odd Cycles Are 3-colourable
Berlin-Poznań-Hamburg-Warsaw Seminar, Hamburg
Sep 2022
New Ramsey Multiplicity Bounds and Search Heuristics
DMV Annual Meeting, Berlin
Aug 2022
New Ramsey Multiplicity Bounds and Search Heuristics
20th RS&A Conference, Gniezno
Jun 2022
New Ramsey Multiplicity Bounds and Search Heuristics
Third Southwestern German Workshop on Graph Theory, Heidelberg
Sep 2021
The Square of a Hamilton Cycle in Randomly Perturbed Graphs
Berlin-Poznań-Hamburg-Warsaw Seminar, Będlewo
Jul 2021
Spanning Subgraphs in Randomly Perturbed Graphs
Mini-Symposium Extremal Combinatorics at BCC 2021 (BCC 2021), Durham
Sep 2020
Factors in Randomly Perturbed Graphs
DMV 2020 Conference, Chemnitz
Sep 2019
The Size-Ramsey Number of Tight 3-Uniform Paths
C&C 2019, NovĂ˝ Smokovec
Aug 2019
Almost Spanning Universality in Random Graphs
10th EUROCOMB Conference, Bratislava
Aug 2019
More Non-Bipartite Forcing Pairs
10th EUROCOMB Conference, Bratislava
Jul 2019
Universality in Randomly Perturbed Graphs
19th RS&A Conference, ZĂĽrich
Nov 2018
Universality in Randomly Perturbed Graphs
37th Kolloquium ĂĽber Kombinatorik (KolKom), Paderborn
Aug 2018
Randomly Perturbed Graphs
First Southwestern German Workshop on Graph Theory, Karlsruhe
Jul 2018
Randomly Perturbed Graphs
Large Networks and Random Graphs Workshop in Frankfurt, Frankfurt
Aug 2017
Embedding Spanning Bounded Degree Subgraphs in Randomly Perturbed Graphs
9th EUROCOMB Conference, Wien
Aug 2017
Finding Tight Hamilton Cycles in Hypergraphs Faster
18th RS&A Conference, Gniezno
Sep 2016
Explicit Construction of Universal Hypergraphs
6th Polish Combinatorial Conference (PCC), Będlewo
Nov 2015
Universality in Random and Sparse Hypergraphs
34th Kolloquium ĂĽber Kombinatorik (KolKom), Ilmenau
Sep 2015
On Spanning Structures in Random Hypergraphs
8th EUROCOMB Conference, Bergen
Jul 2015
Spanning Structures and Universality in Sparse Random Hypergraphs
17th RS&A Conference, Pittsburgh

Research seminar talks

Feb 2024
Maximal Diameter of Simplicial D-complexes
Seminar on Combinatorics, Games and Optimisation, London
Nov 2023
New Ramsey Multiplicity Bounds and Search Heuristics
Seminar on Discrete Mathematics at Adam Mickiewicz University, Poznan
Oct 2022
A General Approach to Transversal Versions of Dirac-type Theorems
Research Seminar Large Networks and Random Graphs, Ilmenau
Jun 2021
Resilience for Tight Hamilton Cycles in Random Hypergraphs
Research Seminar Combinatorics, Berlin
Mar 2021
Between Probabilistic and Extremal Graph Theory
Algorithm Engineering Group Research Seminar at Hasso-Plattner-Institut, Potsdam
Feb 2021
Resilience for Tight Hamilton Cycles in Random Hypergraphs
Research Seminar Large Networks and Random Graphs, Ilmenau
Dec 2020
Resilience for Tight Hamilton Cycles in Random Hypergraphs
Graz Combinatorics and Optimization Seminar, Graz
Feb 2020
The Size-Ramsey Number of Tight 3-Uniform Paths
Research Seminar at Warwick University, Warwick
Dec 2019
The Size-Ramsey Number of Tight 3-Uniform Paths
Research Seminar Combinatorics, Berlin
Nov 2019
The Size-Ramsey Number of Tight 3-Uniform Paths
Seminar on Combinatorics, Games and Optimisation, London
Jun 2019
The Size-Ramsey Number of Tight 3-Uniform Paths
Forschungsseminar Diskrete Mathematik und Algebra, Ilmenau
Apr 2019
The Size-Ramsey Number of Powers of Bounded Degree Trees
Forschungsseminar Diskrete Mathematik und Algebra, Ilmenau
Feb 2018
Randomly Perturbed Graphs
Seminar on Combinatorics, Games and Optimisation, London
Jan 2018
Randomly Perturbed Graphs
Mittagsseminar at ETH ZĂĽrich, Zurich
Jun 2017
Embedding Spanning Bounded Degree Subgraphs in Randomly Perturbed Graphs
Combinatorics Seminar at the University of Warwick, Warwick
Mar 2017
Explicit Construction of Universal Hypergraphs
Seminar on Combinatorics, Games and Optimisation, London
Feb 2017
Universality in Random and Sparse Hypergraphs
Extremal Graph Theory Seminar at The Czech Academy of Sciences, Prague
Jan 2016
Universality in Random and Sparse Hypergraphs
Seminar on Combinatorics at USP, SĂŁo Paulo
Nov 2015
Universality in Random and Sparse Hypergraphs
Research Seminar Combinatorics, Berlin
May 2015
Spanning Structures and Universality in Sparse Random Hypergraphs
Kolloquium Mathematische Informatik at Goethe University Frankfurt, Frankfurt am Main
Dec 2014
On Sidorenko's Conjecture
AG & Oberseminar Diskrete Mathematik, Frankfurt
Nov 2014
Relative Entropy and Sidorenko's Conjecture
Research Seminar Combinatorics, Berlin
May 2014
On the Logarithmic Calculus and Sidorenko's Conjecture
Research Seminar Combinatorics, Berlin

đź“… Event Attendance

Sep 2025
Open Problems in Combinatorics and Graph Theory, Budapest
Aug 2025
22nd RS&A Conference, Vienna
Oct 2024
Symposium Diskrete Mathematik, Berlin

🧑‍🏫 Teaching

winter 2024
Lecturer for Probability and Statistics at FUB
winter 2024
Lecturer for Discovering Mathematics I at FUB
winter 2023
Lecturer for Discrete Mathematics II - Extremal Combinatorics at FUB
summer 2023
Instructor for Seminar on Advances in Extremal Combinatorics at FUB
winter 2022
Instructor for Seminar on Random Graphs at FUB
summer 2022
Assistant for Discrete Mathematics I at FUB
summer 2022
Instructor for Seminar on Advances in Extremal Combinatorics at FUB
winter 2021
Instructor for Seminar on the Caccetta-Häggkvist Conjecture at FUB
summer 2021
Lecturer for Proinformatik I: Logic and discrete mathematics at FUB
autumn 2020
Lecturer for Graph theory at LTCC
summer 2019
Assistant for Calculus II at Technische Universität Ilmenau
winter 2018
Lecturer for Discrete Mathematics at Technische Universität Ilmenau
winter 2018
Assistant for Calculus I at Technische Universität Ilmenau
summer 2017
Assistant for Discrete Mathematics at JWGU
winter 2016
Assistant for Optimisation at JWGU
summer 2014
Tutor for Discrete Mathematics I at FUB
winter 2013
Tutor for Stochastic I at FUB
summer 2013
Tutor for Mathematics for Computer-Scientists II at FUB
winter 2012
Tutor for Mathematics for Computer-Scientists III at FUB
winter 2012
Tutor for Mathematics for Computer-Scientists I at FUB
summer 2012
Tutor for Mathematics for Computer-Scientists II at FUB
winter 2011
Tutor for Mathematics for Computer-Scientists I at FUB
summer 2011
Tutor for Mathematics for Physicists at FUB

đź“ť Organization and outreach

May 2024
Organization of the BPHW Seminar in Discrete Mathematics 2024 in Berlin
May 2024
Talk at the 27. Berliner Tag der Mathematik for school children
Sep 2023
Organization of a Minisymposium on Extremal and Probabilistic Combinatorics at the DMV Annual Meeting in Ilmenau
Nov 2022
Assisted in the organization of the Festkolloquium for Martin Aigner in Berlin
Sep 2022
Organization of a Minisymposium on Extremal and Probabilistic Combinatorics at the DMV Annual Meeting in Berlin
Jun 2022
Organization of an event at the Long Night of Science in Berlin
May 2022
Organization of a Girls’ Day science outreach event in Berlin
May 2019
Organization of an escape room for the Long Night of Technology in Ilmenau