On August 22, 2023, Linda Cook from the IBS Discrete Mathematics Group gave a talk at the Discrete Math Seminar on bounding the dichromatic number of a directed graph not having an induced subgraph isomorphic to a fixed orientation of a path. The title of her talk was “Orientations of P_4 bind the dichromatic number”.

## R. Amzi Jeffs gave a talk on the intersection patterns of convex sets at the Discrete Math Seminar

On August 9, 2023, R. Amzi Jeffs from Carnegie Mellon University gave a talk at the Discrete Math Seminar on the simplicial complexes and convex codes arising from the intersections of convex sets. The title of his talk was “Intersection patterns of convex sets“.

## The 2023 Mini-Workshop on Discrete Geometry was held on August 9 with three talks by Michael Dobbins, Andreas Holmsen, and Minki Kim

On August 9, 2023, the 2023 Mini-Workshop on Discrete Geometry was held at the IBS. This workshop consisted of three talks by Michael Dobbins from SUNY Binghamton, Andreas Holmsen from KAIST, and Minki Kim from GIST. Here is the list of talks.

- Michael Dobbins (SUNY Binghamton):
*Colorful intersections, Tverberg partitions, and geometric transversals* - Andreas Holmsen (KAIST):
*The topology of the complex of ordered partitions* - Minki Kim
^{김민기}(GIST):*Some variants of the colorful Helly theorems*

## Welcome Haotian Yang from Shandong University, a new visiting undergraduate student in the IBS Extremal Combinatorics and Probability Group

The IBS Discrete Mathematics Group welcomes Haotian Yang, a new visiting student of the IBS Extremal Combinatorics and Probability Group. He is currently an undergraduate student of Shandong University. He arrived at IBS on August 6, 2023 and will stay with us until February 1, 2024.

## Daniel Kráľ gave a talk on common graphs with large chromatic numbers at the Discrete Math Seminar

On August 2, 2023, Daniel Kráľ from Masaryk University gave a talk on constructing common graphs with large chromatic numbers at the Discrete Math Seminar. The title of his talk was “High chromatic common graphs.”