## 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“.

## Tuan Tran gave a talk on the minimum saturated families of sets at the Discrete Math Seminar

On January 26, 2021, Tuan Tran from the IBS Discrete Mathematics Group gave a talk at the Discrete Math Seminar on a result towards the conjecture of Erdős and Kleitman on the size of an s-saturated family of subsets of {1,2,…,n}. The title of his talk was “Minimum saturated families of sets“.

## 2020 Combinatorics Workshop (2020 조합론 학술대회) was held on August 24 online

On August 24, Monday, the 2020 Combinatorics Workshop (2020 조합론 학술대회) was held online due to the COVID-19 pandemic. This local workshop series began in 2004 and has been continued to be one of the biggest annual gathering of people in combinatorics located in Korea. Due to the COVID-19 pandemic, it has been reduced to a one-day online conference on Zoom. It was hosted by Kyung Hee University and IBS Discrete Mathematics Group.

The workshop website: https://cw2020.combinatorics.kr

## There were 5 invited speakers.

• Sejeong Bang (방세정), Yeungnam University, Geometric distance-regular graphs
• Ringi Kim (김린기), KAIST, Decomposing planar graphs into graphs with degree restrictions
• Sangwook Kim (김상욱), Chonnam National University, Combinatorics of lattice path matroid polytopes
• Jinyoung Park (박진영), Institute for Advanced Study, Tuza’s Conjecture for random graphs
• Jongyook Park (박종육), Kyungpook National University, On distance-regular graphs with induced subgraphs $K_{r,t}$

## There were 4 contributed talks.

• Byung-Hak Hwang (황병학), Seoul National University, Acyclic orientation polynomials
• Jaeseong Oh (오재성), Seoul National University, On linearization coefficients of q-Laguerre polynomials
• Jun Seok Oh (오준석), Incheon National University, An inverse Erdős-Ginzburg-Ziv theorem for finite groups
• Tuan Tran, IBS Discrete Mathematics Group, The singularity of random combinatorial matrices

## Tuan Tran gave a talk on the anti-concentration phenomena at the Discrete Math Seminar

On August 18, 2020, Tuan Tran from IBS Discrete Mathematics Group gave a talk on the anti-concentration phenomena and its consequences to the random matrix theory. The title of his talk is “Anti-concentration phenomena”.

## Welcome Ben Lund and Tuan Tran, new research fellows in the IBS Discrete Mathematics Group

The IBS discrete mathematics group welcomes Dr. Ben Lund and Dr. Tuan Tran, new research fellows at the IBS discrete mathematics group from August 1, 2020.

Ben Lund received his Ph.D. from the Department of Mathematics at Rutgers University in 2017 under the supervision of Prof. Shubhangi Saraf. Before joining the IBS, he was a postdoc at Princeton University and a postdoc at the University of Georgia.

Tuan Tran received his Ph.D. from the Department of Mathematics at the Freie Universität Berlin in 2015 under the supervision of Prof. Tibor Szabó. Before joining the IBS, he was a lecturer at Hanoi University of Science and Technology, a postdoc at ETH Zürich, and a postdoc at Czech Academy of Sciences. He won the IBS Young Scientist Fellowship.

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