Research Visits
Research Visits
Embedded Files
(scheduled) Oberwolfach Research Institute for Mathematics (Arbeitsgemeinschaft: Combinatorial Hodge Theory), Germany (October 12 - 17, 2025), host: Chris Eur, June Huh, Matt Larson
(scheduled) Shanghai Center for Mathematical Sciences, Shanghai, China (September 14 - 19, 2025), host: Huhei Wu
Shanghai Center for Mathematical Sciences, Shanghai, China (April 10 - 18, 2025), host: Jorge Olivares-Vinales
Seoul National University, Seoul, Korea (March 10 - 14, 2025), host: Seok Hyeong Lee
The University of British Columbia, Vancouver, Canada (November 25 - December 5, 2024), host: Jozsef Solymosi
Sorbonne University, Paris, France (October 7 - October 24, 2024), host: Karim Adiprasito
Shanghai Center for Mathematical Sciences, Shanghai, China (June 5 - 11, 2024), host: Jorge Olivares-Vinales
Ulsan National Institute of Science and Technology, Ulsan, South Korea (December 28 - 30, 2023), host: Jinjoo Yoo
Gwangju Institute of Science and Technology, Gwangju, South Korea (October 30 - November 5, 2023), host: Minki Kim
University of Copenhagen, Copenhagen, Denmark (July 3 - September 30, 2023), host: Karim Adiprasito
Vietnam Institute for Advanced Study in Mathematics, Hanoi (July 15 - 23, 2023), host: Thang Pham
University of Rochester, Rochester, NY, USA (May 21 - 27, 2022), host: Jonathan Pakianathan
University of British Columbia, Canada
University of Copenhagen, Denmark
Shanghai Center for Mathematical Sciences, China
Gwangju Institute of Science and Technology, Korea
Organization
IBS-DIMAG Workshop on Topology and Combinatorics, IBS, Daejeon, Korea (November 11, 2024)
Research Talks
Research Talks
2025
(scheduled) SCMC Combinatorics Seminar, Shanghai Center for Mathematical Sciences, Shanghai, China (TBA) invited by Huhei Wu
Title: Recent progress on Diophantine sets over finite fields (1 hour)
BIRS Workshop - Finite Geometry and Extremal Combinatorics, Institute for Advanced Study in Mathematics (IASM), China (June 27, 2025)
Title: Quasi-random hypergraphs arising from multivariate polynomials and their applications to Diophantine sets (55 min)
Discrete Analysis at Yonsei (DAYS) workshop, Yonsei University, Korea (June 19, 2025) invited by Joonkyung Lee
Title: A construction of pseudorandom graphs for off-diagonal Ramsey numbers (50 min)
CanaDAM 2025 - Finite fields and finite geometry, Ottawa, Canada (May 23, 2025) invited by Chi Hoi Yip
Title: Diophantine tuples over finite fields (25 min)
Title: Diophantine tuples over finite fields (20 min)
2025 KMS Spring Meeting, KAIST, Daejeon, Korea (April 25, 2025)
Title: Combinatorics of unimodal maps (20 min)
2024
1. Discrete Math Seminar, University of British Columbia, Vancouver, Canada (December 3, 2024) invited by Jozsef Solymosi
Title: A q-analogue of the binomial coefficient from orthogonal groups and its applications to off-diagonal Ramsey numbers (1 hour)
2. 2024 DIMAG Internal Workshop, Lahan hotel Jeonju, Korea (November 19, 2024)
Title: Lower bounds for the clique number of Diophantine graphs (15 min)
3. Workshop on Topology and Combinatorics, IBS, Korea (November 11, 2024)
Title: The Charney-Davis conjecture and its related complexes (survey) (30 min)
4. 2024 Algebraic and Analytic Structures on Manifolds and their Applications, The K Hotel Gyeongju, Korea (September 26-28, 2024) invited by Eunjeong Lee
Title: When finite fields meet combinatorics (2 hours)
5. 2024 Korean Student Combinatorics Workshop, Gongju Hanok Village, Korea (July 29, 2024) invited by Donggyu Kim
Title: A postdoc life in Korea (1 hour)
6. 2024 IBS-DIMAG workshop on combinatorics and geometric measure theory, Daejeon, Korea (July 18, 2024)
Title: Improved upper bounds for the largest size of Diophantine m-tuples (30 min)
7. Summit:280, Budapest, Hungary (July 8, 2024)
Title: Paley-like quasi-random graphs arising from polynomials (20 min)
8. Discrete Math Seminar, IBS DIMAG (June 18, 2024) invited by Sang-il Oum
Title: Paley-like quasi-random graphs arising from polynomials (1 hour)
9. Rookies Pitch, Seoul National University (June 4, 2024) invited by Uhi Rinn Suh
Title: When finite fields meet combinatorics (30 min)
10. Discrete Analysis Seminar, Yonsei University (May 7, 2024) (1 hour) invited by Jaeseong Oh
Title: Paley-like quasi-random graphs arising from polynomials (1 hour)
11. Special Lecture, Korea University (May 3, 2024) invited by Sangjib Kim
Title: An Invitation to Spectral Graph Theory: Expander mixing lemma (75 min)
12. 2024 KMS Spring Meeting, Daejeon Convention Center, Korea (April 19, 2024)
Title: Improved upper bounds for the largest size of Diophantine m-tuples (20 min)
13. Combinatorics Seminar, Yeungnam University (February 20, 2024) invited by Jihye Park
Title: Improved upper bounds of the largest size of generalized Diophantine m-tuples (30 min)
14. Workshop on Combinatorial Geometry, University of Miami, Florida (January 31, 2024)
Title: A q-analogue of the binomial coefficient from orthogonal groups (30 min)
15. Discrete Math Seminar, Online, University of British Columbia (January 24, 2024) invited by Joshua Zahl
Title: Intersection patterns and incidence theorems (1 hour)
2023
1. 2023 KSIAM Annual Meeting, Special Session: Geometric and Topological Combinatorics, Kimdaejung Convention Center, Gwangju, (November 4, 2023) invited by Minki Kim
Title: Orientable triangulable manifolds are essentially quasigroups (20 min)
2. Colloquium, Chonnam National University, Korea (October 30, 2023) invited by Bokhee Im
Title: A construction of orientable triangulable manifolds from quasigroups (1 hour)
3. Developments in Combinatorics, Grand Hyatt Jeju, Korea (October 21, 2023) invited by Hong Liu
Title: Geometry of nondegenerate spaces over finite fields (15 min)
4. Algebra and Logic Seminar, Online, University of Denver (October 13th, Friday 2023) invited by Charlotte Aten
Title: Improved upper bounds of the size of generalized Diophantine tuples (1 hour)
5. Finite Geometry & Friends - A Brussels Summer School on Finite Geometry, Vrije Universiteit Brussel, Belgium (September 18, 2023)
Title: Combinatorics of Euclidean spaces over finite fields (20 min)
6. The Korea-Taiwan-Vietnam Joint Meeting on Discrete Geometry and Geometric Measure Theory, Vietnam Institute for Advanced Study in Mathematics, Hanoi, Vietnam (July 18th, 2023) invited by Thang Pham
Title: Intersection patterns and incidence theorems (25 min)
7. 2023 KMS Spring Meeting, Special Session: Extremal Combinatorics: Methods and Applications, Daejeon Convention Center, Korea (April 28th, 2023) invited by Nika Salia
Title: Intersection patterns and incidence theorems (20 min)
8. 2023 KMS Spring Meeting, Special Session: Combinatorics of Symmetric Functions, Daejeon Convention Center, Korea (April 28th, 2023) invited by Meesue Yoo
Title: Modules of the 0-Hecke algebra for genomic Schur functions (20 min)
9. Unist 수리과학부 Seminar, Online, Unist (February 13th,14th,15th, 2023) invited by Wan Lee
Title: (1) Classification of nondegenerate quadratic forms over finite fields (2) The size of spheres over finite fields (3) An invitation for spectral graph theory - Expander mixing lemma (3 hours)
2022
1. Workshop on Algebras with Related Topics, Jeju National University (November 4th, 2022) invited by Boran Kim
Title: Modules of the 0-Hecke algebra for genomic Schur functions (1 hour)
2. 2022 DIMAG and ECOPRO Internal Workshop, Utop Marina Hotel, Yeosu, Korea (October 31st, 2022) invited by Sang-il Oum
Title: Lower bounds for off-diagonal Ramsey numbers (20 min)
3. Korea-Taiwan-Vietnam joint Seminar in Combinatorics and Analysis, Online (October 28th, 2022) invited by Thang Pham
Title: Weak Bruhat interval modules of the 0-Hecke algebras for genomic Schur functions (1 hour)
4. Topology and Combinatorics Seminar at Ajou University, Online (October 6th, 2022) invited by JiSun Huh
Title: Weak Bruhat interval modules of the 0-Hecke algebras for genomic Schur functions (1 hour)
5. Public Presentation, Online, Sejong Academy of Science and Arts (high school) (July 7th, 2022) invited by Yeochan Lee
Title: Binomial coefficients : beyond counting (이항계수: 경우의 수를 넘어서) (90 min)
6. 2022 KWMS The 17th International Conference, Algebra Session, KIAS (June 23, 2022)
Title: Modules of the 0-Hecke algebra for genomic Schur functions (20 min)
7. Colloquium, Online, Korea University (March 25, 2022) invited by Ya-Ryong Heo
Title: Combinatorics of Euclidean spaces over finite fields (1 hour)
8. The 24th KIAS Combinatorics Workshop, Shilla Stay Haeundae, Busan, Korea (February 23, 2022) invited by Seok-Jin Kim
Title: Threshold functions for some geometric incidence configurations in finite vector spaces (40 min)
9. KAIST Combinatorics Lab. Workshop 2022.02, St. John's Hotel, Gangneung, Korea (February 09, 2022) invited by Jang Soo Kim
Title: Combinatorics of Euclidean spaces over finite fields (50 min)
10. 2022 Workshop on Algebra at Sono Belle, Sono Belle Cheonan, KIAS (January 16, 2022)
Title: Combinatorics of Euclidean spaces over finite fields (40 min)
2021
1. 2021 Combinatorics Workshop, The Bloomvista, Yangpyeong, IBS Discrete Mathematics Group (December 21, 2021)
Title: Combinatorics of Euclidean spaces over finite fields (25 min)
2. One day Workshop, KIAS (December 15, 2021)
Title: Threshold functions for some geometric configurations in finite vector spaces (30 min)
3. 2021 DIMAG Internal Workshop, St. John's Hotel, Gangneung, Korea (November 15-17, 2021) invited by Sang-il Oum
Title: Euclidean Kneser graphs (20 min)
4. Discrete Math Seminar, IBS DIMAG, Daejeon, Korea (July 20, 2021) invited by Sang-il Oum
Title: Combinatorics of Euclidean spaces over finite fields (1 hour)
5. Combinatorial Algebraic Geometry - Geometry and Combinatorics from Root Systems, Online, ICERM (March 23, 2021)
Title: Combinatorics of quadratic spaces over finite fields (10 min)
6. CombinaTexas 2020/21, Online, Texas A&M University (February 20, 2021)
Title: A combinatorial correspondence between finite Euclidean geometries and symmetric subsets of Z/nZ (20 min)
7. Number Theory Seminar, Online, University of California, Irvine (January 14, 2021) invited by Nathan Kaplan
Title: An isometric invariant of quadratic spaces over finite fields (1 hour)
2020
1. Combinatorics Seminar, Online, University of Copenhagen (November 12, 2020) invited by Karim Adiprasito
Title: Combinatorics of quadratic spaces over finite fields (90 min)
2. Combinatorics Seminar, Online, University of Rochester (November 5, 2020) invited by Alex Iosevich
Title: Combinatorics of quadratic spaces over finite fields (1 hour)
3. Graduate Student Workshop on Representation Theory and Combinatorics, Online, Sogang University (September 17, 2020) invited by Young-Hun Kim
Title: Combinatorics of quadratic spaces over finite fields (1 hour)
4. AlCoVE: an Algebraic Combinatorics Virtual Expedition, Online (June 16, 2020) (Poster presentation)
Title: Combinatorics of quadratic spaces over finite fields (1 hour)
5. Graduate Online Combinatorics Colloquium, Online (April 15, 2020)
Title: Combinatorics of quadratic spaces over finite fields (1 hour)
2019
1. Binghamton University Graduate Conference in Algebra and Topology, Binghamton University, New York (November 2, 2019)
Title: An isometric invariant of combinatorial type of quadratic spaces over finite fields (30 min)
2. 7th annual Mississippi Discrete Math Workshop, University of Mississippi, Oxford (October 27, 2019)
Title: The dot-binomial coefficients (25 min)
3. Facets of Algebraic Geometry (for Fulton's 80th), University of Michigan, Ann Arbor (October 18, 2019) picture
Title: Combinatorics of quadratic spaces over finite fields (5 min)
Presentations
1. Oral exam, University of Rochester (October 4th, 2019)
Title: Incidences between planes over finite fields slide
2. The 8th mathemaniac, Seoul National University (January 6, 2019)
Title: How far are Lie groups from matrix groups? slide
3. Presentation for Topics in Algebraic Topology Class, University of Rochester (March 27, 2018)
Title: The Steenrod algebra and its dual slide
4. Presentation for Riemannian Manifolds Reading Seminar, University of Rochester (February 27, 2018)
Title: Curvatures slide
5. Master Thesis Defense, Ewha Womans University (June 3, 2016)
Title: Cluster algebra structure of certain quadratic algebras slide, picture
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