The IBS Discrete Mathematics Group had its first “DIMAG internal workshop” at Jeonju Lahan Hotel located in Jeonju Hanok Village on November 16-18, 2020. Participants include almost all current members of DIMAG and Jaehoon Kim from KAIST, and Hong Liu from University of Warwick. Every participant had a chance to present their current research problems informally.
DIMAG hosted “The 2nd East Asia Workshop on Extremal and Structural Graph Theory” at Jeju
From October 31 to November 4, 2019, IBS discrete mathematics group hosted the 2nd East Asia Workshop on Extremal and Structural Graph Theory in Jeju. It 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. Participants have great chance to discuss recent progress in graph theory, interesting open problems, finding new potential collaborators, and exploring the beautiful island.
Invited Speakers
- Ping Hu, Sun Yat-Sen University, China
- Jaehoon Kim, KAIST, Korea
- O-joung Kwon, Incheon National University and IBS Discrete Mathematics Group, Korea
- Joonkyung Lee, University of Hamburg, Germany
- Binlong Li, Northwestern Polytechnical University, China
- Hongliang Lu, Xi’an Jiaotong University, China
- Abhishek Methuku, IBS Discrete Mathematics Group, Korea
- Atsuhiro Nakamoto, Yokohama National University, Japan
- Kenta Noguchi, Tokyo University of Science, Japan
- Kenta Ozeki, Yokohama National University, Japan
- Boram Park, Ajou University, Korea
- Yuejian Peng, Hunan University, China
- Zi-Xia Song, University of Central Florida, U.S.A.
- Tomáš Kaiser, University of West Bohemia, Czech Republic.
- Maho Yokota, Tokyo University of Science, Japan.
- Xuding Zhu, Zhejiang Normal University, China
Participants
| Toshiki | Abe | Yokohama National University |
| Jungho | Ahn | KAIST / IBS Discrete Mathematics Group |
| Sejeong | Bang | Yeungnam University |
| Ilkyoo | Choi | Hankook University of Foreign Studies |
| Jeong Ok | Choi | GIST |
| Shinya | Fujita | Yokohama City University |
| Alexander | Gavrilyuk | Pusan National University |
| Pascal | Gollin | IBS Discrete Mathematics Group |
| Kevin | Hendrey | IBS Discrete Mathematics Group |
| Ping | Hu | Sun Yat-sen University |
| Tomáš | Kaiser | University of West Bohemia |
| Dong Yeap | Kang | KAIST / IBS Discrete Mathematics Group |
| Gen | Kawatani | Tokyo University of Science |
| Donggyu | Kim | KAIST / IBS Discrete Mathematics Group |
| Jaehoon | Kim | KAIST |
| Jeong Han | Kim | KIAS |
| Ringi | Kim | KAIST |
| Seog-Jin | Kim | Konkuk University |
| Younjin | Kim | Ewha Womans University |
| O-joung | Kwon | Incheon National University / IBS Discrete Mathematics Group |
| Young Soo | Kwon | Yeungnam University |
| Dabeen | Lee | IBS Discrete Mathematics Group |
| Duksang | Lee | KAIST / IBS Discrete Mathematics Group |
| Joonkyung | Lee | University of Hamburg |
| Sang June | Lee | Kyung Hee University |
| Hui | Lei | Nankai University |
| Binlong | Li | Northwestern Polytechnical University |
| Henry | Liu | Sun Yat-sen University |
| Hongliang | Lu | Xi’an Jiaotong University |
| Jie | Ma | University of Science and Technology of China |
| Yulai | Ma | Nankai University |
| Ryota | Matsubara | Shibaura Institute of Technology |
| Abhishek | Methuku | IBS Discrete Mathematics Group |
| Atsuhiro | Nakamoto | Yokohama National University |
| Kenta | Noguchi | Tokyo University of Science |
| Suil | O | SUNY-Korea |
| Sang-il | Oum | IBS Discrete Mathematics Group / KAIST |
| Kenta | Ozeki | Yokohama National University |
| Boram | Park | Ajou University |
| Jongyook | Park | Kyungpook National University |
| Yuejian | Peng | Hunan University |
| Yoshio | Sano | University of Tsukuba |
| Yongtang | Shi | Nankai University |
| Mark | Siggers | Kyungpook National University |
| Zi-Xia | Song | University of Central Florida |
| Casey | Tompkins | IBS Discrete Mathematics Group |
| Guanghui | Wang | Shandong University |
| Douglas | West | Zhejiang Normal University |
| Hehui | Wu | Shanghai Center for Mathematical Sciences |
| Maho | Yokota | Tokyo U Science |
| Xin | Zhang | Xidian University |
| Xuding | Zhu | Zhejiang Normal University |
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.
“2019 Combinatorics Workshop” was held from August 13 to August 15, 2019 at Incheon.

The 2019 Combinatorics Workshop (2019 조합론 학술대회) was held from August 13, 2019 to August 15, 2019 at the SKYPARK Hotel, Songdo, Incheon. There were 16 talks.
Plenary Speaker
- Mihyun Kang (강미현), Graz University of Technology
Keynote Speakers
- Jaehoon Kim (김재훈), KAIST
- Seung Jin Lee (이승진), Seoul National University
- Meesue Yoo (유미수), Dankook University
Invited Speakers
- Eun-Kyung Cho (조은경), Hankuk University of Foreign Studies
- Soogang Eoh (어수강), Seoul National University
- JiSun Huh (허지선), Sungkyunkwan University
- Jihyeug Jang (장지혁), Sungkyunkwan University
- Dong Yeap Kang (강동엽), KAIST and IBS Discrete Mathematics Group
- Min Jeong Kang (강민정), Incheon National University
- Dabeen Lee (이다빈), IBS Discrete Mathematics Group
- Kang-Ju Lee (이강주), Seoul National University
- Myeonghwan Lee (이명환), Incheon National University
- Jihye Park (박지혜), Yeungnam University
- Sun-mi Yun (윤선미), Sungkyunkwan University
“2019-2 IBS One-Day Conference on Extremal Graph Theory” was held on August 12, 2019.
The 2019-2 IBS One-Day Conference on Extremal Graph Theory was held on August 12, 2019 at the IBS Discrete Mathematics Group. There were four talks. Here is a list of talks.
- Jaehoon Kim (김재훈), KAIST: Tree decompositions of graphs without large bipartite holes
- Hong Liu (刘鸿), University of Warwick: Recent advance in Ramsey-Turán theory
- Abhishek Methuku, IBS Discrete Mathematics Group: Bipartite Turán problems for ordered graphs
- Péter Pál Pach, Budapest University of Technology and Economics: On some applications of graph theory to number theoretic problems
“2019 IBS Summer Research Program on Algorithms and Complexity in Discrete Structures” was held for three weeks from July 22 to August 10
The 2019 IBS Summer Research Program on Algorithms and Complexity in Discrete Structures was held from July 22, 2019 to August 10, 2019 at the IBS Discrete Mathematics Group. Over the three weeks, 15 talks were given and there was ample time for discussion. It was organized by Eunjung Kim (CNRS) and Sang-il Oum. Here is a list of major participants.
Major Participants


- Pierre Aboulker, ENS Ulm, France
- Jungho Ahn, KAIST and IBS Discrete Mathematics Group
- Rémy Belmonte, University of Electro-Communications, Japan
- Benjamin Bergougnoux, University of Paris Diderot, France
- Édouard Bonnet, ENS Lyon, France
- Nick Brettell, Durham University, UK
- Yixin Cao, Hong Kong Polytechnic University, China
- Michael Dobbins, Binghamton University, USA
- Chris Eppolito, Binghamton University, USA
- Archontia Giannopoulou, National and Kapodistrian University of Athens, Greece
- Sang-il Oum, IBS Discrete Mathematics Group and KAIST
- William Overman, California Institute of Technology
- Mamadou M. Kante, University Clermont Auvergne, France
- Donggyu Kim, KAIST and IBS Discrete Mathematics Group
- Eunjung Kim (김은정), LAMSADE-CNRS, France
- Stefan Kratsch, Humboldt-Universität zu Berlin, Germany
- O-joung Kwon (권오정), Incheon National University, Korea
- Michael Lampis, Université Paris-Dauphine, France
- Dabeen Lee, IBS Discrete Mathematics Group
- Duksang Lee, KAIST and IBS Discrete Mathematics Group
- Euiwoong Lee (이의웅), NYU, USA
- Valia Mitsou, Université Paris-Diderot, France
- Florian Sikora, University Paris Dauphine, France
- Magnus Wahlström, Royal Holloway, University of London, UK
“2019 IBS Summer Research Program on Algorithms and Complexity in Discrete Structures” has started.
On July 22, 2019, the 2019 IBS Summer Research Program on Algorithms and Complexity in Discrete Structures started at the IBS discrete mathematics group, running for three weeks in the summer.
2019 Combinatorics Workshop (2019 조합론 학술대회) will be held in Songdo, Incheon from August 13 to August 15, 2019
This year, 2019 Combinatorics Workshop (2019 조합론 학술대회) will be held in Songdo, Incheon from August 13, 2019 to August 15, 2019. This is an annual meeting of combinatorics people in Korea, started in 2004.
The list of major speakers includes Mihyun Kang from T. U. Graz and Jaehoon Kim from KAIST, Seung Jin Lee from Seoul National University, and Meesue Yoo from Dankook University.
The conference website is located on https://cw2019.combinatorics.kr/. Please register if you want to participate.
올해 2019 조합론 학술대회가 인천 송도에서 2019년 8월 13일부터 15일까지 열립니다. 이 행사는 2004년부터 시작된 한국 내 조합론 연구자들의 연례 미팅입니다.
이번의 주요 연사로는 오스트리아 Graz 공대의 강미현 교수, KAIST 김재훈 교수, 서울대 이승진 교수, 단국대 유미수 교수가 있습니다.
워크샵 홈페이지는 https://cw2019.combinatorics.kr/입니다. 참가를 원하시면 등록하시기 바랍니다.

Previous Combinatorics Workshops
- 2018 Combinatorics Workshop (2018 조합론 학술대회)
- Date: August 17 – 18 (Fri-Sat), 2018
- Venue: Seoul National University, Seoul
- 2017 Combinatorics Workshop (2017 조합론 학술대회)
- Date: August 16 – 17 (Wed-Thu), 2017
- Venue: Sungkyunkwan University, Suwon
- 2016 Combinatorics Workshop (2016 조합론 학술대회)
- Date: July 21 – 23 (Thu-Sat), 2016
- Venue: KAIST, Daejeon
- 2015 Combinatorics Workshop (2015 조합론 학술대회)
- Date: July 13-16 (Mon-Thu), 2015
- Venue:Center for Applications of Mathematical Principles (CAMP), NIMS, Daejeon
- 2014 Combinatorics Workshop (2014 조합론 학술대회)
- Date: October 31 – November 1 (Fri-Sat), 2014
- Venue: Ajou University, Suwon
- 2013 Combinatorics Workshop (2013 조합론 학술대회)
- Date: August 7 – 9 (Wed-Fri), 2013
- Venue: Center for Applications of Mathematical Principles (CAMP), NIMS, Daejeon
- 2012 Combinatorics Workshop (2012 조합론 학술대회)
- Date: August 9 – 10 (Thu-Fri), 2012
- Venue: Chonnam National University, Gwangju
- 2011 Combinatorics Workshop (2011 조합론 학술대회)
- Date: August 17 – 19 (Wed-Fri), 2011
- Venue: Kangwon National University, Chuncheon
- 2010 Combinatorics Workshop (2010 조합론 학술대회)
- Date: August 20 – 21 (Fri-Sat), 2010
- Venue: Yeongnam University, Gyeongsan
- 2009 Combinatorics Workshop (2009 조합론 학술대회)
- Date: August 20 – 21 (Thu-Fri), 2009
- Venue: KAIST, Daejeon
- 2008 Workshop on Combinatorics (2008 조합론 학술대회)
- Date: August 7 – 8 (Thu-Fri), 2008
- Venue: Sungkyunkwan University, Suwon
- 2007 Combinatorics Workshop (2007 조합론 학술대회)
- Date: August 6 – 8 (Mon-Wed), 2007
- Venue: KAIST, Daejeon
- 2006 Combinatorics Workshop (2006 조합론 학술대회)
- Date: August 9 – 10 (Wed-Thu), 2006
- Venue: Yeongnam University, Gyeongsan
- 2005 Combinatorial Mathematics Conference (2005 조합수학 학술대회)
- Date: August 8 – 10 (Mon-Wed), 2005
- Venue: Yonsei University, Seoul
- 2004 Combinatorics Workshop (2004 조합론 학술대회)
- Date: August 16 – 17 (Mon-Tue), 2004
- Venue: Yonsei University, Seoul
DIMAG had its first workshop “2019-1 IBS Workshop on Graph Theory”

Jeong Han Kim (김정한) 
Cory T. Palmer 
Martin Balko 
Dong Yeap Kang (강동엽) 
Boram Park (박보람) 
Dániel Gerbner
DIMAG had its first workshop “2019-1 IBS Workshop on Graph Theory” on February 11 and 12, 2019. There were 6 invited talks — Jeong Han Kim (KIAS), Cory T. Palmer (Univ. of Montana), Martin Balko (Charles Univ.), Dong Yeap Kang (KAIST), Boram Park (Ajou Univ.), and Dániel Gerbner (Alfréd Rényi Institute of Mathematics). We would like to thank all speakers and participants.
The talks are recorded but due to technical problems, only four talks are available online.
2019-1 IBS Workshop on Graph Theory (Feb. 11-12, 2019). Registration due: Jan. 28
The Discrete Mathematics Group (DIMAG) at the Institute for Basic Science (IBS) will have its first workshop in Feb. 11-12, 2019. If you want to participate, then please register by January 28 on the website. We plan to provide accommodation for speakers and selected participants requested during the online registration.
- Title: 2019-1 IBS Workshop on Graph Theory
- Location: IBS, 2nd Floor of the Theory Building, Room B232 (Daejeon)
- Website: https://dimag.ibs.re.kr/event/2019-1-graph-theory/
- Organizer: Sang-il Oum, Younjin Kim








