Previous
September 28th, 2023.
Tsinghua Open Problems Seminar, Virtual (VooV)
Open problems in discrete geometry
slides
August 21st, 2023.
Soochow University Summer School on Combinatorics, Virtual (Zoom)
Forbidden subgraphs and spherical two-distance sets
slides
arxiv
July 22nd, 2023.
Hebei Normal University Seminar, Virtual (Zoom)
Forbidden subgraphs and spherical two-distance sets
slides
arxiv
July 21st, 2018.
Hebei Normal University Seminar, Virtual (Zoom)
Spherical Tarski's plank problem
announcement
slides
arxiv
July 13th, 2023.
Workshop on Graph Theory and Combinatorics, Luoyang, Henan, China
Extremal Problems in Discrete Geometry
slides
June 8th, 2023.
Canadian Discrete and Algorithmic Mathematics, University of Winnipeg
Rainbow odd cycles
announcement
slides
arxiv
March 23rd, 2023.
Auburn University DMS Combinatorics Seminar, Virtual (Zoom)
Forbidden subgraphs and spherical two-distance sets
announcement
slides
arxiv
March 18th, 2023.
AMS Spring Southeastern Sectional Meeting, Georgia Institute of Technology
Rainbow odd cycles
announcement
slides
arxiv
February 16th, 2023.
Illinois State University Discrete Mathematics Seminar, Virtual (Zoom)
Forbidden subgraphs and spherical two-distance sets
announcement
slides
arxiv
November 2nd, 2022.
National University of Singapore Combinatorics and Graph Theory Seminar, Virtual (Zoom)
Forbidden subgraphs and spherical two-distance sets
announcement
slides
arxiv
October 23rd, 2022.
AMS Fall Western Sectional Meeting, University of Utah
Forbidden subgraphs and spherical two-distance sets
announcement
slides
arxiv
October 16th, 2022.
AMS Fall Southeastern Sectional Meeting, University of Tennessee at Chattanooga
Eigenvalues, forbidden subgraphs, and Ramsey
announcement
slides
arxiv
July 7th, 2022.
Copenhagen-Jerusalem Combinatorics Seminar, Virtual (Zoom)
Rainbow structures via topological methods
announcement
slides
arxiv
June 21st, 2022.
Codes and Expansions Seminar, Virtual (Zoom)
Forbidden subgraphs and spherical two-distance sets
announcement
slides
arxiv
June 15th, 2022.
SIAM Conference on Discrete Mathematics, Carnegie Mellon University
Eigenvalues, forbidden subgraphs, and Ramsey
announcement
slides
arxiv
April 13th, 2022.
Bridge to Research Seminar, Arizona State University
Extremal Problems in Discrete Geometry
announcement
slides
April 1st, 2022.
Discrete Math Seminar, Emory University
Forbidden subgraphs and spherical two-distance sets
announcement
slides
arxiv
January 24th, 2022.
Workshop on Algebraic Combinatorics, Virtual (Webex)
Forbidden subgraphs and spherical two-distance sets
announcement
slides
arxiv
July 27th, 2021.
Hua Loo-Keng Young Mathematicians Forum, Virtual (VooV)
Forbidden subgraphs and spherical two-distance sets
announcement
slides
arxiv
July 26th, 2021.
Hua Loo-Keng Young Mathematicians Forum, Virtual (VooV)
Eigenvalue multiplicity and equiangular lines
announcement
slides
arxiv
July 23rd, 2021.
Hua Loo-Keng Young Mathematicians Forum, Virtual (VooV)
Extremal Problems in Discrete Geometry
announcement
slides
July 20th, 2021.
SIAM Conference on Discrete Mathematics, Virtual (Zoom)
Spherical two-distance sets and spectral theory of signed graphs
announcement
slides
arxiv
July 2nd, 2021.
Moscow Conference on Combinatorics and Applications, Virtual (Zoom)
Forbidden subgraphs and spherical two-distance sets
announcement
slides
March 23rd, 2021.
Codes and Expansions Seminar, Virtual (Zoom)
Spherical two-distance sets and spectral theory of signed graphs
announcement
video
slides
arxiv
October 10th, 2020.
Special Session on Structural and Extremal Graph Theory, Fall Southeastern Sectional Meeting (Zoom)
Negligible obstructions and Turán exponents
announcement
slides
arxiv
August 13th, 2020.
SCMS Combinatorics Seminar, Shanghai Center for Mathematical Sciences (Zoom)
Negligible obstructions and Turán exponents
announcement
video
slides
arxiv
July 9th, 2020.
Seminar on topological combinatorics, Combinatorial Structures and Processes (Zoom)
Rainbow odd cycles
announcement
slides
arxiv
July 3rd, 2020.
Seminar on Combinatorics, National Taiwan University (Webex)
Spherical two-distance sets and spectral theory of signed graphs
announcement
slides
arxiv
March 26th, 2020.
Discrete Mathematics Seminar, University of Delaware
Equiangular lines with a fixed angle
announcement
slides
arxiv
March 10th, 2020.
Combinatorics Seminar, Brandeis University
The colorful world of rainbow sets
announcement
arxiv
February 10th, 2020.
Job Candidate Talk, Arizona State University
Extremal Problems in Discrete Geometry
announcement
slides
February 4th, 2020.
Job Candidate Talk, McGill University
Extremal Problems in Discrete Geometry
announcement
slides
January 30th, 2020.
Discrete Mathematics Seminar, University of Massachusetts Amherst
Equiangular lines with a fixed angle
announcement
arxiv
January 14th, 2020.
Job Candidate Talk, Georgia Institute of Technology
Extremal Problems in Discrete Geometry
announcement
slides
December 18th, 2019.
Combinatorics Seminar, Technion – Israel Institute of Technology
Equiangular lines with a fixed angle
announcement
arxiv
November 18th, 2019.
Discrete Mathematics Seminar, Iowa State University
Equiangular lines with a fixed angle
announcement
video
arxiv
October 15th, 2019.
Graph Theory and Combinatorics Seminar, University of Illinois at Urbana-Champaign
Equiangular lines with a fixed angle
announcement
arxiv
October 14th, 2019.
Combinatorics and Probability Seminar, University of Illinois at Chicago
Equiangular lines with a fixed angle
announcement
arxiv
July 22nd, 2019.
Topological Methods in Combinatorics, Charles University
Colored Bárány's theorem
announcement
slides
arxiv
July 5th, 2019.
Combinatorics Seminar, Shanghai Jiaotong University
Spectral radius: local and global
announcement
arxiv
June 22nd, 2019.
The 18th AHU–USTC Joint Seminar, Anhui University
Forbidden subgraphs and equiangular lines
announcement
arxiv
June 19th, 2019.
Combinatorics and Graph Theory Seminar, University of Science and Technology of China
Cooperative colorings
announcement
arxiv
June 12th, 2019.
The 8th International Congress of Chinese Mathematicians, Tsinghua University
Rainbow structures via algebraic topology
announcement
slides
arxiv
June 5th, 2019.
Discrete Mathematics Seminar, Shanghai Center for Mathematical Sciences
Rainbow structures via algebraic topology
announcement
arxiv
October 19th, 2018.
Combinatorics Seminar, Emory University
Rainbow fractional matchings
announcement
slides
arxiv
September 5th, 2018.
Combinatorics Seminar, Massachusetts Institute of Technology
Spherical Tarski's plank problem
announcement
slides
arxiv
August 13th, 2018.
Combinatorics Workshop, Capital Normal University
Forbidden subgraphs and equiangular lines (in Chinese)
arxiv
August 11th, 2018.
Combinatorics Workshop, Capital Normal University
Spherical Tarski's plank problem (in Chinese)
arxiv
June 5th, 2018.
SIAM Conference on Discrete Mathematics, University of Colorado Denver
Forbidden subgraphs and equiangular lines
announcement
slides
arxiv
May 23rd, 2018.
Computer Science Seminar, Ariel University
Forbidden subgraphs and equiangular lines
announcement
May 17th, 2018.
ACO Seminar, Carnegie Mellon University
Rainbow fractional matchings
announcement
arxiv
April 25th, 2018.
Combinatorics Seminar, Ben Gurion University
How to guess an n-digit number
announcement
arxiv
April 24th, 2018.
Research Seminar in Combinatorics, Tel Aviv University
How to guess an n-digit number
announcement
arxiv
March 20th, 2018.
ERC Workshop: Geometric Transversal and Epsilon-Nets, Ein Gedi
Spherical Tarski's plank problem
arxiv
March 16th, 2018.
School Colloquim, Peking University
Spherical Tarski's plank problem (in Chinese)
announcement
slides
arxiv
March 14th, 2018.
An Hour of Maths, Peking University
Five miniatures of linear algebra (in Chinese)
slides
January 21st, 2018.
Nonlinear Analysis and Optimization Seminar, Technion – Israel Institute of Technology
On spherical Tarski's plank problem
announcement
arxiv
December 12th, 2017.
Applied Mathematics Seminar, ORT Braude College
Finding the closest pair of points on two polyhedra
announcement
arxiv
August 20th, 2017.
Nonlinear Analysis and Optimization Seminar, Technion – Israel Institute of Technology
Finding the closest pair of points on two polyhedra
announcement
arxiv
May 28th, 2017.
Israel Mathematical Union 2017 Annual Meeting, Rimonim Palm Beach, Akko
On spherical Tarski's plank problem
announcement
slides
arxiv
April 5th, 2017.
Combinatorics Gathering, Technion – Israel Institute of Technology
On spherical Tarski's plank problem
arxiv
March 6th, 2017.
Combinatorics Seminar, Hebrew University of Jerusalem
Relations between Tverberg points and central points
announcement
August 23rd, 2016.
Hungarian–Israeli Combinatorial Days, Technion – Israel Institute of Technology
Bipartite algebraic graphs without quadrilaterals
announcement
slides
arxiv
April 19th, 2016.
Gradaute Student Seminar, Carnegie Mellon University
Races beyond Riemann hypothesis
announcement
video
March 1st, 2016.
Graduate Student Seminar, Carnegie Mellon University
Random algebraic method and its application
announcement
video
November 17th, 2015.
Graduate Student Seminar, Carnegie Mellon University
Classification of bipartite algebraic graphs without quadrilaterals
announcement
October 13th, 2015.
Graduate Student Seminar, Carnegie Mellon University
Why elliptic curves are called elliptic?
announcement
July 30th, 2015.
Random Structures and Algorithms, Carnegie Mellon University
Topological method for the colored Bárány’s theorem
announcement
slides
arxiv
June 18th, 2015.
Connections in Discrete Mathematics, Simon Fraser University
A bound on Turán number for cycles of even length
announcement
slides
arxiv
April 9th, 2015.
Graduate Student Seminar, Carnegie Mellon University
Hardy–Littlewood circle method and Waring's problem
announcement
February 19th, 2015.
Graduate Student Seminar, Carnegie Mellon University
The best card trick
announcement
January 15th, 2015.
Graduate Student Seminar, Carnegie Mellon University
An expedition to the world of p-adic numbers
announcement
blog
November 4th, 2014.
Graduate Student Seminar, Carnegie Mellon University
Introduction to Diophantine approximation
announcement
blog
September 23rd, 2014.
Graduate Student Seminar, Carnegie Mellon University
A taste of topological methods in combinatorics
announcement
November 8th, 2012.
Math Club, Carnegie Mellon University
Computability and busy beaver
October 29th, 2012.
Model Theory Seminar, Carnegie Mellon University
Many models for unstable first-order theory (4 talks)
announcement