On September 10, 2024, Zhihan Jin (金之涵) from ETH Zürich gave a talk at the Discrete Math Seminar on the analog of Helly’s theorem inside the Hamming cube. The title of his talk was “The Helly number of Hamming balls and related problems“.

## Neal Bushaw gave a talk on the rainbow version of the saturation problem at the Discrete Math Seminar

On September 6, 2024, Neal Bushaw from Virginia Commonwealth University gave a talk at the Discrete Math Seminar on the rainbow version of the saturation problem. The title of his talk was “Edge-colored Extremal Problems“.

## Amadeus Reinald gave a talk on finding an oriented tree inside a digraph of large chromatic number at the Discrete Math Seminar

On September 3, 2024, Amadeus Reinald from LIRMM, Université de Montpellier gave a talk at the Discrete Math Seminar on the existence of every oriented tree of fixed size inside a digraph of large chromatic number. The title of his talk was “Oriented trees in $O(k\sqrt k)$-chromatic digraphs, a subquadratic bound for Burr’s conjecture“.

## Welcome Colin Geniet, a new member of the IBS Discrete Mathematics Group

The IBS discrete mathematics group welcomes Dr. **Colin Geniet**, a new research fellow at the IBS Discrete Mathematics Group from September 1, 2024. He received his Ph.D. from ENS de Lyon under the supervision of Prof. Stéphan Thomassé. He is interested in graphs in relation with logic and algorithmic, and more specifically structural graph theory, graph parameters, finite model theory, and parameterized complexity.

## Welcome Eng Keat Hng, a new member of the IBS Extremal Combinatorics and Probability Group

The IBS discrete mathematics group welcomes Dr. **Eng Keat Hng**, a new research fellow at the IBS Extremal Combinatorics and Probability Group from September 1, 2024. He received his Ph.D. from the London School of Economics and Political Science under the supervision of Prof. Julia Böttcher and Prof. Peter Allen. He is interested in extremal and probabilistic combinatorics.

## Welcome Gunwoo Kim (김건우), a new graduate student of the IBS Discrete Mathematics Group

The IBS Discrete Mathematics Group welcomes **Gunwoo Kim (김건우)**, a new graduate student of the Discrete Mathematics Group from September 1, 2024. She received her B.S. degree from the Technische Universität Berlin and entered the School of Computing at KAIST as a graduate student on September 2024. Her advisor is Eunjung Kim (김은정).