기초과학연구원 이산수학그룹
The IBS discrete mathematics group welcomes Dr. Zhifei Yan, a new research fellow at the IBS Extremal Combinatorics and Probability Group, starting September 1, 2025. He received his Ph.D. in 2025 from the Instituto Nacional de Matemática Pura e Aplicada (IMPA), Rio de Janeiro, Brazil, under the supervision of Prof. Rob Morris. He is interested in extremal and probabilistic combinatorics.
The 2025 Summer School “Frontiers of Combinatorics” was held at IBS from July 28, 2025 to August 8, 2025. Lior Gishboliner from the University of Toronto gave a one-week-long lecture on removal lemmas and related topics. Yuval Filmus from Technion gave a 1-week-long lecture on Boolean Algebra. This school was organized by the IBS Extremal Combinatorics and Probability Group.
The IBS Discrete Mathematics Group is pleased to welcome Dr. Tony Huynh as a new senior research fellow, starting August 1, 2025. Before joining IBS, he was an assistant professor at the Sapienza Università di Roma, in Rome, Italy. He earned his Ph.D. from the Department of Combinatorics and Optimization at the University of Waterloo in Waterloo, Canada in 2009, under the supervision of Prof. Jim Geelen. He is mainly interested in graphs, matroids, and combinatorial optimization. Welcome!
More than 70 people attended the 2025 Summer School on Combinatorics and Algorithms from July 14 to July 18, 2025, held at POSTECH. Édouard Bonnet from CNRS and Michał Pilipczuk from University of Warsaw gave lectures. This school was organized by Eun Jung Kim (KAIST / IBS / CNRS), Eunjin Oh (POSTECH), and Sang-il Oum (IBS Discrete Mathematics Group).
The IBS Discrete Mathematics Group welcomes Hyungu Kim (김현구), a new graduate student of the Discrete Mathematics Group from July 1, 2025. He received his B.S. degree from KAIST and entered the Department of Mathematical Sciences at KAIST as a graduate student on March 2025. His advisor is Andreas Holmsen.
As of July 1, 2025, Roohani Sharma has been appointed as the IBS Young Scientist Fellow at the Discrete Mathematics Group. The title of her project is “Resolving Inconsistencies: Directed Cycles and beyond”. Congratulations!
The IBS Discrete Mathematics Group welcomes Dr. Seunghun Lee, a new research fellow at the IBS Discrete Mathematics Group starting July 1, 2025. He received his Ph.D. from KAIST in August 2020. He was a Robert Riley visiting assistant professor at Binghamton University in the USA from August 2020 to July 2022, a postdoctoral research fellow at Hebrew University of Jerusalem from August 2022 to January 2024, and a BK21 Research Assistant Professor at KAIST from 2024. Welcome!
The IBS Discrete Mathematics Group welcomes Sarah Wajsbrot, a new graduate student of the Discrete Mathematics Group from May 6, 2025 until July 5, 2025. She is a Ph.D. student in computer science at Université de Lorraine. Her advisor is Xavier Goaoc.
The IBS discrete mathematics group welcomes Dr. Roohani Sharma, a new research fellow at the IBS Discrete Mathematics Group from May 1, 2025. She received her Ph.D. from the Institute of Mathematical Sciences, Chennai, India, under the supervision of Prof. Saket Saurabh. She is interested in parameterized complexity and kernelization. Previously, she was a researcher at the University of Bergen, Norway, and a Lise-Meitner Post-doctoral Fellow at the Max Planck Institute for Informatics in Germany.
The IBS Discrete Mathematics Group welcomes Ho Kim (김호), a new graduate student of the Discrete Mathematics Group from May 1, 2025. He received his B.S. degree from Hanyang University and entered the Department of Mathematical Sciences at KAIST as a graduate student on September 2024. His advisor is Jaehoon Kim (김재훈).