On November 28, Hyunwoo Lee (이현우) from KAIST and IBS Extremal Combinatorics and Probability Group gave a talk at the Discrete Math Seminar on the existence of a Steiner triple system in a 3-uniform hypergraph with large minimum codegree. The title of his talk was “Towards a high-dimensional Dirac’s theorem“.

## Seunghun Lee (이승훈) gave a talk on the existence of hypergraphs embeddable in ℝ^d with large chromatic number at the Discrete Math Seminar

On November 20, 2023, Seunghun Lee (이승훈) from the Hebrew University of Jerusalem gave a talk at the Discrete Math Seminar on the existence of k-uniform hypergraphs embeddable in ℝ^d with large chromatic number. The title of his talk was “On colorings of hypergraphs embeddable in R^d.”

*Due to technical issues, some portions of the videos were not adequately recorded on YouTube.*

## Bruce A. Reed gave a talk on finding every k-vertex tree as a minor in a graph of large minimum degree and large maximum degree at the Discrete Math Seminar

On November 7, 2023, Bruce A. Reed from the Academia Sinica, Taiwan gave a talk at the Discrete Math Seminar on the existence of every k-vertex tree as a minor in a graph with certain lower bounds on the minimum degree and the maximum degree. The title of his talk was “Some Variants of the Erdős-Sós Conjecture“.

## “The 3rd East Asia Workshop on Extremal and Structural Graph Theory” was held in Okinawa

From November 1 to November 5, 2023, the 3rd East Asia Workshop on Extremal and Structural Graph Theory was held in Okinawa, Japan. It is a workshop to bring active researchers in the field of extremal and structural graph theory, especially in East Asia such as China, Japan, and Korea. Participants have a great chance to discuss recent progress in graph theory, interesting open problems, and finding new potential collaborators. The previous workshops were held in Shanghai (2018) and Jeju (2019). The IBS Discrete Mathematics Group was the main sponsor of the workshop.

## Invited Speakers

- Jiangdong Ai (Nankai University, China)
- Ilkyoo Choi (Hankuk University of Foreign Studies, Korea)
- Linda Cook (IBS, Korea)
- Shagnik Das (National Taiwan University, Taiwan)
- Shinya Fujita (Yokohama City University, Japan)
- Bill Jackson (Queen Mary University of London, UK)
- Dong Yeap Kang (IBS, Korea)
- Joonkyung Lee (Yonsei University, Korea)
- Henry Liu (Sun Yet-Sen University, China)
- Xujun Liu (Xijiao-Liverpool University, China)
- Shunichi Maezawa (Tokyo University of Science, Japan)
- Tuan Tran (University of Science and Technology, China)
- Shoichi Tsuchiya (Senshu University, Japan)
- Kiyoshi Yoshimoto (Nihon University, Japan)

## Organizers

- Seog-Jin Kim, Konkuk University, Korea.
- Sang-il Oum, IBS Discrete Mathematics Group, Korea and KAIST, Korea.
- Kenta Ozeki, Yokohama National University, Japan.
- Hehui Wu, Shanghai Center for Mathematical Sciences, China.