Jun Yan
I am a Postdoctoral Research Associate in University of Oxford working with Professor Peter Keevash. Recently, I finished my PhD in University of Warwick under the supervision of Professor Richard MontgomeryLink opens in a new window. My main research interests are Extremal and Enumerative Combinatorics. I can be reached via email at jun dot yan at warwick dot ac dot uk.
Publications
- Descents and inversions in powers of permutationsLink opens in a new window (arxivLink opens in a new window)
with Stijn CambieLink opens in a new window, Enumerative Combinatorics and Applications, 6.2 (2026), S2R13.
- Exponential odd-distance sets under the Manhattan metricLink opens in a new window (arxivLink opens in a new window)
with Alberto Espuny DíazLink opens in a new window, Emma HoganLink opens in a new window, Freddie IllingworthLink opens in a new window, Lukas MichelLink opens in a new window, and Julien PortierLink opens in a new window, The Electronic Journal of Combinatorics, 32.4 (2025), P4.32.
- Lattice paths enumerations weighted by ascent lengthsLink opens in a new window (arxivLink opens in a new window)
Discrete Mathematics, 349.2 (2026), 114783.
- Ramsey numbers of bounded degree trees versus general graphsLink opens in a new window (arxivLink opens in a new window)
with Richard MontgomeryLink opens in a new window and Matías Pavez-SignéLink opens in a new window, Journal of Combinatorial Theory, Series B, 173 (2025), 102-145.
- Results on pattern avoidance in parking functionsLink opens in a new window (arxivLink opens in a new window)
Enumerative Combinatorics and Applications, 5.1 (2025), S2R2.
- Degree sequences of triangular multigraphsLink opens in a new window (arxivLink opens in a new window)
with John TalbotLink opens in a new window, The Electronic Journal of Combinatorics, 31.3 (2024), P3.22.
- Remarks on the distribution of colors in Gallai coloringsLink opens in a new window (arxivLink opens in a new window)
with Joey FefferLink opens in a new window and Yaoying FuLink opens in a new window, Discrete Mathematics, 343.10 (2020), 111996.
Preprints
with Daniel IľkovičLink opens in a new window, arxiv:2601.16953.
arxiv:2511.15673.
with Kyle CelanoLink opens in a new window, Abigail OllsonLink opens in a new window, and Niraj VelankarLink opens in a new window, arxiv:2510.23573.
arxiv:2510.17736.
with Richard MontgomeryLink opens in a new window and Matías Pavez-SignéLink opens in a new window, arxiv:2509.07934.
with Daniel IľkovičLink opens in a new window, arxiv:2503.14474.
with Wallace PeasleeLink opens in a new window and Attila SaliLink opens in a new window, arxiv:2502.04741.
with Candida BowtellLink opens in a new window, Andrea FreschiLink opens in a new window, and Gal KronenbergLink opens in a new window, arxiv:2501.03216.
with Wallace PeasleeLink opens in a new window and Attila SaliLink opens in a new window, arxiv:2312.11446.
with Zhuo WuLink opens in a new window, arxiv:2309.05606.
Talks
- Ramsey numbers of trees (slidesLink opens in a new window)
Oxford Combinatorial Theory SeminarLink opens in a new window, University of Oxford, 10/02/2026.
- An improved hypergraph Mantel's Theorem (slidesLink opens in a new window)
Eurocomb'25Link opens in a new window, Hungarian Academy of Sciences, 27/08/2025.
- Ramsey numbers of trees
The 22nd International Conference on Random Structures & AlgorithmsLink opens in a new window, TU Wien, 07/08/2025.
- An improved hypergraph Mantel's Theorem
The 29th Postgraduate Combinatorial ConferenceLink opens in a new window, University of Glasgow, 30/04/2025.
- Ramsey numbers of trees
LSE PhD Seminar on Combinatorics, Games and OptimisationLink opens in a new window, London School of Economics and Political Science, 24/01/2025.
- Ramsey numbers of trees
UCL Combinatorics SeminarLink opens in a new window, University College London, 25/11/2024.
- Exponential odd-distance sets under the Manhattan metric (slidesLink opens in a new window)
Shandong University Mathematics Rising Stars SeminarLink opens in a new window, Shandong University (online), 12/11/2024.
- A collection of sums over Catalan paths (slidesLink opens in a new window, videoLink opens in a new window)
The 3rd International Conference on Enumerative Combinatorics and ApplicationsLink opens in a new window, University of Haifa (online), 28/08/2024.
- A collection of sums over Catalan paths (slidesLink opens in a new window)
The 30th British Combinatorial ConferenceLink opens in a new window, Queen Mary University of London, 01/07/2024.
- Pattern avoidance in parking functions (slidesLink opens in a new window)
The 28th Postgraduate Combinatorial ConferenceLink opens in a new window, London School of Economics and Political Science, 15/04/2024.
- Ramsey goodness of bounded degree trees versus general graphs (slidesLink opens in a new window)
Birmingham-Warwick Combinatorics MeetingLink opens in a new window, University of Birmingham, 12/12/2023.
- An interesting forbidden matrix problem (slidesLink opens in a new window)
LSE PhD Seminar on Combinatorics, Games and OptimisationLink opens in a new window, London School of Economics and Political Science, 01/12/2023.
- Distribution of colours in rainbow H-free colourings (slidesLink opens in a new window)
Warwick Combinatorics SeminarLink opens in a new window, University of Warwick, 19/05/2023.
- Distribution of colours in Gallai colourings
The 27th Postgraduate Combinatorial ConferenceLink opens in a new window, University of Birmingham, 27/03/2023.
- Counting domino tilings and lozenge tilings (slidesLink opens in a new window)
Warwick Maths Society Talks, University of Warwick, 21/02/2023.
- Ramsey goodness of bounded degree trees versus general graphs
The 20th International Conference on Random Structures and AlgorithmsLink opens in a new window, Institute of European Culture in Gniezno, 01/08/2022.