Category: seminar

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Jakob Greilhuber gave a talk on the problem of deleting a small set of vertices to make every component small at the Discrete Math Seminar

On October 28, 2025, Jakob Greilhuber from the CISPA Helmholtz Center for Information Security gave a talk at the Discrete Math Seminar on the parameterized complexity of the problem of deleting k vertices to make every component small. The title of his talk was “A Dividing Line for Structural Kernelization of Component Order Connectivity via Distance to Bounded Pathwidth“.

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Ilkyoo Choi (최일규) gave a talk on the average degree of list-color-critical graphs and DP-color-critical graphs at the Discrete Math Seminar

On October 14, 2025, Ilkyoo Choi (최일규) from Hankuk University of Foreign Studies and IBS Discrete Mathematics Group gave a talk at the Discrete Math Seminar on the average degree of list-color-critical graphs and DP-color-critical graphs. The title of his talk was “An improved lower bound on the number of edges in list critical graphs via DP coloring“.

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Mujin Choi (최무진) gave a talk on unavoidable induced minors in graphs of large tree-independence number without a fixed star induced subgraph

On September 16, 2025, Mujin Choi (최무진) from KAIST and the IBS Discrete Mathematics Group gave a talk at the Discrete Math Seminar on unavoidable induced minors in graphs of large tree-independence number without a fixed induced star. The title of his talk was “Excluding ladder and wheel as induced minor in graphs without induced stars“.

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Zhifei Yan gave a talk on covering the vertex set of a properly edge-colored graph with two vertex-disjoint rainbow cycles at the Discrete Math Seminar

On September 2, 2025, Zhifei Yan from the IBS Extremal Combinatorics and Probability Group gave a talk at the Discrete Math Seminar on covering the vertex set of a properly edge-colored graph with two vertex-disjoint rainbow cycles. The title of his talk was “A Rainbow version of Lehel’s conjecture“.

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2025 Korean Student Combinatorics Workshop was held in Gyeongju from August 20 to August 24

The 2025 Korean Student Combinatorics Workshop (KSCW2025, 2025 조합론 학생 워크샵) was held in The-K Hotel Gyeongju from August 20 to August 24, 2025. Sponsored by the IBS Discrete Mathematics Group, this event aims to provide a platform for Korean graduate students working on combinatorics and related areas to establish a foundation for collaborative research. This is a continuation of the same workshop held last year.

This workshop was organized by the following four graduate students.

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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