“2021 Combinatorics Workshop” was held from December 20 to December 22, 2021 at Yangpyeong

The 2021 Combinatorics Workshop (2021 조합론 학술대회) was held from December 20, 2021 to December 22, 2021 at the Bloomvista, Yangpyeong. There were 5 invited talks and 12 contributed talks.

Invited Speakers

Speakers of the contributed talks

  • Jungho Ahn, KAIST / IBS DIMAG
  • Jin-Hwan Cho, NIMS
  • Linda Cook, IBS DIMAG
  • Cheolwon Heo, Sungkyunkwan University
  • Seonghyuk Im, KAIST
  • Hyobin Kim, Kyungpook National University
  • Minki Kim, IBS DIMAG
  • Hyemin Kwon, Ajou University
  • Hyunwoo Lee, KAIST
  • Sang June Lee, Kyung Hee University
  • Jaehyeon Seo, KAIST
  • Semin Yoo, KIAS

Organizing Committee

Participants (50 people, all of whom are fully vaccinated against COVID-19)

  • Jungho Ahn, speaker, KAIST / IBS DIMAG
  • Sejeong Bang, session chair, Yeungnam University
  • Rutger Campbell, IBS DIMAG
  • Debsoumya Chakraborti, IBS DIMAG
  • Eun-Kyung Cho, Hankuk University of Foreign Studies
  • Hyunsoo Cho, Ewha Womans University
  • Jin-Hwan Cho, speaker, NIMS
  • Jeong-Ok Choi, organizer/session chair, GIST
  • Linda Cook, speaker, IBS DIMAG
  • Taehyun Eom, KAIST
  • Cheolwon Heo, speaker, Sungkyunkwan University
  • Seonghyuk Im, speaker, KAIST
  • Jihyeug Jang, Sungkyunkwan University
  • Dosang Joe, NIMS
  • Donggyu Kim, KAIST / IBS DIMAG
  • Donghyun Kim, Sungkyunkwan University
  • Dongsu Kim, invited speaker, KAIST
  • Hyobin Kim, speaker, Kyungpook National University
  • Jaehoon Kim, KAIST
  • Jang Soo Kim, Sungkyunkwan University
  • Jinha Kim, IBS DIMAG
  • Minki Kim, speaker, IBS DIMAG
  • Seog-Jin Kim, session chair, Konkuk University
  • Doowon Koh, Chungbuk National University
  • Hyemin Kwon, speaker, Ajou University
  • O-joung Kwon, Incheon National University / IBS DIMAG
  • Dabeen Lee, IBS DIMAG
  • Duksang Lee, KAIST / IBS DIMAG
  • Hyunwoo Lee, speaker, KAIST
  • Joonkyung Lee, invited speaker, Hanyang University
  • Sang June Lee, speaker, Kyung Hee University
  • Seung Jin Lee, Seoul National University
  • Hong Liu, invited speaker, University of Warwick, UK
  • Ben Lund, IBS DIMAG
  • Suil O, invited speaker, SUNY Korea
  • Jaeseong Oh, KIAS
  • Sang-il Oum, organizer/session chair, IBS DIMAG / KAIST
  • Jae Hyun Park, Kyung Hee University
  • Seonjeong Park, invited speaker, Jeonju University
  • Jaehyeon Seo, speaker, KAIST
  • Seunghyun Seo, session chair, Kangwon National University
  • Heesung Shin, organizer/session chair, Inha University
  • Mark Siggers, Kyungpook National University
  • Jaebum Sohn, Yonsei University
  • Minho Song, Sungkyunkwan University
  • U-keun Song, Sungkyunkwan University
  • Jeong Hyun Sung, Seoul National University
  • Tuan Tran, IBS DIMAG
  • Sounggun Wee, KAIST / IBS DIMAG
  • Semin Yoo, speaker, KIAS

Host and Sponsors

Hong Liu is moving to IBS as a Chief Investigator to start the IBS Extremal Combinatorics and Probability Group (ECOPRO) on April 2022 and is hiring up to 5 postdocs in all fields of combinatorics with emphasis on extremal and probabilistic combinatorics, graph theory, Ramsey theory, combinatorial number theory and discrete geometry

We are very excited to learn that Prof. Hong Liu from University of Warwick, UK will move to the Institute for Basic Science (IBS) as a Chief Investigator (CI) to lead a new group called the Extremal Combinatorics and Probability Group (ECOPRO) on April 2022. This new group will be also located in the IBS headquarter and is expected to work closely with the IBS Discrete Mathematics Group (DIMAG). Both DIMAG and ECOPRO belong to the IBS Center for Mathematical and Computational Sciences together with the Data Science Group and the Biomedical Mathematics Group and we share the staff members.

The website was made recently. https://www.ibs.re.kr/ecopro/

Yesterday, the IBS Extremal Combinatorics and Probability Group (ECOPRO) posted the hiring announcement for up to 5 postdocs. Here are a few paragraphs from the announcement.

 The Extremal Combinatorics and Probability Group (ECOPRO) at the Institute for Basic Science (IBS) in Daejeon, South Korea invites applications for 5 postdoctoral research fellowship positions.

ECOPRO is a new research group that will be officially launched in April 1, 2022 at IBS, led by Prof. Hong Liu. We welcome highly motivated postdoc researchers with outstanding research potential in all fields of combinatorics with emphasis on extremal and probabilistic combinatorics, graph theory, Ramsey theory, combinatorial number theory and discrete geometry.

This appointment is for 2 years with possible 1 year extension contingent upon the outstanding performance of the researcher. The starting salary is no less than 57,000,000 KRW (about 48,400 USD or 42,800 EUR). The appointment starting date is flexible: between April 1 and Oct 1, 2022. This is a purely research position and will have no teaching duties.

A complete application packet should include

  1. Curriculum vitae including a publication list (PDF format)
  2. Research statement (PDF format)
  3. Up to 3 best papers or preprints
  4. Consent to Collection and Use of Personal Information (Please convert to a PDF file)
  5. Two or three recommendation letters.

For full consideration, applicants should email items 1, 2, 3, and 4 and arrange their recommendation letters emailed to ecopro@ibs.re.kr by January 14, 2022.

Recommendations letters forwarded by an applicant will not be considered.

Tuan Tran gave a talk on the volume of the intersection of two balls in a metric space with applications at the Discrete Math Seminar

On December 14, 2021, Tuan Tran from the IBS Discrete Mathematics Group gave a talk at the Discrete Math Seminar on sufficient conditions for balls in a metric space to have small intersection and their applications. The title of his talk was “Exponential decay of intersection volume with applications on list-decodability and sphere-covering bounds“.

Eun-Kyung Cho (조은경) gave a talk on the minimum independent dominating set at the Discrete Math Seminar

On December 7, 2021, Eun-Kyung Cho (조은경) from the Hankuk University of Foreign Studies gave a talk at the Discrete Math Seminar on various upper bounds for the minimum independent dominating set (or, the minimum maximal independent set) in a graph. The title of her talk was “Independent domination of graphs with bounded maximum degree“.

Seonghyuk Im (임성혁) gave a talk on the existence of a large complete topological minor in a graph without small dense subgraphs at the Discrete Math Seminar

On November 30, 2021, Seonghyuk Im (임성혁) from KAIST gave a talk at the Discrete Math Seminar on the existence of a large complete topological minor in a graph of bounded average degree when the graph has no small dense subgraphs. The title of his talk was “Large clique subdivisions in graphs without small dense subgraphs“.