I am the head of the Extremal Combinatorics and Probability Group (ECOPRO) and a distinguished research fellow (首席科学家) at the Institute for Basic Science (IBS). Previously, I was a faculty and a UKRI Future Leaders Fellow at the Mathematics Institute at University of Warwick. Before that, I was a Leverhulme Early Career Fellow, working with Oleg Pikhurko. I got my Ph.D. in 2015 at University of Illinois at Urbana Champaign, advised by Józsi Balogh.

• I am co-organising the Discrete Math Seminar, the Virtual Discrete Math Colloquium and regular summer/winter schools at IBS. See ECOPRO page for announcements.
• SIAM Journal on Discrete Mathematics (Associate editor, 2023-)

Research

I am interested in extremal and probabilistic combinatorics, graph theory, discrete geometry, Ramsey theory, and combinatorial number theory.

Selected papers

• A solution to Erdős and Hajnal’s odd cycle problem, with Richard Montgomery,
  Journal of the American Mathematical Society, 2023. See also Gil Kalai’s blog
• New lower bounds on kissing numbers and spherical codes in high dimensions, with Irene Gil Fernández, Jaehoon Kim, Oleg Pikhurko, American Journal of Mathematics, 2023.
• The exact minimum number of triangles in graphs of given order and size, with Oleg Pikhurko, Katherine Staden, Forum of Mathematics, Pi, 2020. See also Oxford news
• Sharp bound on the number of maximal sum-free subsets of integers, with József Balogh, Maryam Sharifzadeh, Andrew Treglown, Journal of the European Mathematical Society, 2018.
• Proof of Komlós’s conjecture on Hamiltonian subsets, with Jaehoon Kim, Maryam Sharifzadeh, Katherine Staden, Proceedings of the London Mathematical Society, 2017.