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Ben Lund gave a talk on the existence of an embedding of every almost spanning tree with specified distances of edges into a finite vector space at the Discrete Math Seminar

On December 4, 2023, Ben Lund from the IBS Discrete Mathematics Group gave a talk at the Discrete Math Seminar on the existence of an embedding of every almost spanning tree with specified distances of edges into a finite vector space. The title of his talk was “Almost spanning distance trees in subsets of finite vector spaces.”

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Hyunwoo Lee (이현우) gave a talk on the existence of a Steiner triple system in a 3-uniform hypergraph with large minimum codegree at the Discrete Math Seminar

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“.

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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.
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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“.

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“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

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.
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Robert Hickingbotham gave a talk on a partition of a planar graph into connected induced subgraphs of bounded size so that all long paths intersect some part more than once at the Discrete Math Seminar

On October 24, 2023, Robert Hickingbotham from Monash University gave a talk at the Discrete Math Seminar on the existence of a partition of a planar graph into connected induced subgraphs of bounded size so that all long paths intersect some part more than once and its application to k-planar graphs and powers of planar graphs. The title of his talk was “Powers of planar graphs, product structure, and blocking partitions“.

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Congratulations Dong Yeap Kang (강동엽) for receiving the Sangsan Prize for Young Mathematicians (상산젊은수학자상) from the Korean Mathematical Society

Our former member, Dr. Dong Yeap Kang (강동엽), has been selected as one of the three winners of this year receiving the Sangsan Prize for Young Mathematicians (상산젊은수학자상) from the Korean Mathematical Society. This prize is for those with outstanding academic achievements in mathematics who are within 5 years of receiving their Ph.D. degree. Dr. Kang was a research student of the IBS Discrete Mathematics Group and received his Ph.D. in 2020 from KAIST under the supervision of Sang-il Oum. He was a postdoctoral researcher at the University of Birmingham for 3 years and currently, he is a Young Scientist Fellow at the IBS Extremal Combinatorics and Probability Group. The award ceremony will be held on October 27, 2023 at the Seoul National University during the 2023 KMS Annual Meeting. Congratulations!

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The 2023 Vertex-Minor Workshop was held from October 15 to 20 at Jeju

The 2023 Vertex-Minor Workshop was held from October 15, 2023 to October 20, 2023 at SONO Belle Jeju in Korea. This workshop aimed to foster collaborative discussions and explore the various aspects of vertex-minors, including structural theory and their applications. There were 17 participants from Korea, Italy, UK, Australia, Japan, and China and participants had great time to discuss open problems related to the vertex-minors of graphs.

Talks

  • October 16: Sang-il Oum, Survey of vertex-minors
  • October 17: O-joung Kwon, The grid theorem for vertex-minors
  • October 17: James Davies, Vertex-minors and preparing graph states
  • October 17: Paul Wollan, Flat-wall theorem for vertex-minors

Participants

Organizers

IBS 이산수학그룹 Discrete Mathematics Group
기초과학연구원 수리및계산과학연구단 이산수학그룹
대전 유성구 엑스포로 55 (우) 34126
IBS Discrete Mathematics Group (DIMAG)
Institute for Basic Science (IBS)
55 Expo-ro Yuseong-gu Daejeon 34126 South Korea
E-mail: dimag@ibs.re.kr, Fax: +82-42-878-9209
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