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5th East Asia Workshop on Extremal and Structural Graph Theory
November 27 Thursday - November 30 Sunday
Seoul, Korea
The 5th East Asia Workshop on Extremal and Structural Graph Theory is a workshop to bring active researchers in the field of extremal and structural graph theory, especially in the East Asia such as China, Japan, and Korea.
Date
November 27, 2025 Thursday (Arrival Day) — November 30, 2025 Sunday (Departure Day)
Venue
Fraser Place Namdaemun, Seoul
Program Book
Invited Speakers
- Shinya Fujita (Yokohama City University)
- Jie Han (Beijing Institute of Technology)
- Tony Huynh (IBS Discrete Mathematics Group)
- Jaehoon Kim (KAIST)
- O-joung Kwon (Hanyang University / IBS Discrete Mathematics Group)
- Hong Liu (IBS Extremal Combinatorics and Probability Group)
- Jie Ma (University of Science and Technology of China / Tsinghua University)
- Shun-ichi Maezawa (Nihon University)
- Boram Park (Seoul National University)
- Shohei Satake (Kumamoto University)
- Tuan Tran (University of Science and Technology of China)
- Shoichi Tsuchiya (Senshu University)
- Xuding Zhu (Zhejiang Normal University)
Organizers
Seog-Jin Kim, Sang-il Oum, Kenta Ozeki, Hehui Wu
Registration
Invitation Only. https://indico.ibs.re.kr/event/1041/
There is no registration fee and one dinner (banquet) will be provided.
History
- 4th East Asia Workshop on Extremal and Structural Graph Theory
- Mar. 27 – Mar. 31, 2025.
- School of Mathematics, Sun-Yet Sen University, Guangzhou, China
- Organizers: Ping Hu, Seog-Jin Kim, Kenta Ozeki, Hehui Wu.
- 3rd East Asia Workshop on Extremal and Structural Graph Theory
- Nov. 1- Nov. 5, 2023.
- The Southern Beach Hotel & Resort, Okinawa, Japan
- Sponsored by the IBS Discrete Mathematics Group, Korea.
- Organizers: Seog-Jin Kim, Sang-il Oum, Kenta Ozeki, Hehui Wu.
- 2nd East Asia Workshop on Extremal and Structural Graph Theory
- Oct. 31-Nov. 4, 2019.
- Held at UTOP UBLESS Hotel, Jeju, Korea
- Sponsored by the IBS Discrete Mathematics Group, Korea.
- Organizers: Seog-Jin Kim, Sang-il Oum, Kenta Ozeki, Hehui Wu.
- 1st East Asia Workshop on Extremal and Structural Graph Theory
- Nov. 30-Dec. 2, 2018.
- Held and sponsored by the Shanghai Center for Mathematical Sciences in China, under the name 2018 SCMS Workshop on Extremal and Structural Graph Theory.
- Organizers: Ping Hu, Seog-Jin Kim, Kenta Ozeki, Hehui Wu.
Thursday
November 27, 2025
| Time | Speaker | Affiliation | Title |
|---|---|---|---|
| 16:00–18:00 | Registration & Discussions | ||
Friday
November 28, 2025
| Time | Speaker | Affiliation | Title | |
|---|---|---|---|---|
| 09:20–10:00 | Jaehoon Kim | KAIST | Hamilton cycles in pseudorandom graphs: Dirac’s theorem and approximate decompositions | |
| 10:00–10:30 | Coffee Break | |||
| 10:30–11:10 | Jie Ma | University of Science and Technology of China / Tsinghua University | An exponential improvement for Ramsey lower bounds | |
| 11:20–12:00 | Shinya Fujita | Yokohama City University | Connectivity keeping paths containing prescribed vertices in highly connected triangle-free graphs | |
| 12:00–14:00 | Lunch Break | |||
| 14:00–14:40 | Shun-ichi Maezawa | Nihon University | Tree versus tree of preorder induced by rainbow forbidden subgraphs | |
| 14:50–15:30 | Tony Huynh | IBS Discrete Mathematics Group | Rainbow triangles and the Erdős–Hajnal problem in projective geometries | |
| 15:30–15:50 | Coffee Break | |||
| 16:30–17:30 | Problem Session | |||
Saturday
November 29, 2025
| Time | Speaker | Affiliation | Title | |
|---|---|---|---|---|
| 09:20–10:00 | Xuding Zhu | Zhejiang Normal University | TBA | |
| 10:00–10:30 | Coffee Break | |||
| 10:30–11:10 | Hong Liu | IBS Extremal Combinatorics and Probability Group | Chromatic, homomorphism, blowup thresholds and beyond | |
| 11:20–12:00 | Shohei Satake | Kumamoto University | TBA | |
| 12:00–14:00 | Lunch Break | |||
| 14:00–14:40 | Shoichi Tsuchiya | Senshu University | On the number of contractible edges in plane triangulations | |
| 14:50–15:30 | Tuan Tran | University of Science and Technology of China | Littlewood-Offord bounds on the symmetric groups and applications | |
| 15:30–15:50 | Coffee Break | |||
| 15:50–16:30 | O-joung Kwon | Hanyang University / IBS Discrete Mathematics Group | A coarse Erdős–Pósa theorem | |
| 16:30–17:30 | Problem Session | |||
| 18:30–21:00 | Banquet | |||
Sunday
November 30, 2025
| Time | Speaker | Affiliation | Title |
|---|---|---|---|
| 10:00–10:40 | Jie Han | Beijing Institute of Technology | Perturbation of dense graphs |
| 10:40–10:50 | Break | ||
| 10:50–11:30 | Boram Park | Seoul National University | Graphs avoiding cycles of length 0 modulo 4 |
| 11:30–12:00 | Closing | ||
