On July 18-19, 2022, Jinyoung Park (박진영) from Stanford University gave two talks on the proof of the Kahn-Kalai conjecture at the Discrete Math Seminar. The title of her talk was “thresholds“.

## Welcome Sebastian Wiederrecht, a new member of the IBS Discrete Mathematics Group

The IBS discrete mathematics group welcomes Dr. **Sebastian Wiederrecht**, a new research fellow at the IBS discrete mathematics group from July 16, 2022. He received his Ph.D. from Technische Universität Berlin under thesupervision of Prof. Stephan Kreutzer. He is interested in graph theory, in particular the structural matching theory.

## Kevin Hendrey gave a talk on describing a graph as a subgraph of the strong product of a graph of small tree-width and a small complete graph at the Discrete Math Seminar

On July 11, 2022, Kevin Hendrey from IBS Discrete Mathematics Group gave a talk at the Discrete Math Seminar on describing a graph as a subgraph of the strong product of a graph of a small tree-width and a small complete graph. The title of his talk was “Product Structure of Graph Classes with Bounded Treewidth“.

## Sepehr Hajebi gave an online talk on bounding the tree-width of graphs with forbidden induced subgraphs at the Virtual Discrete Math Colloquium

On July 7, 2022, Sepehr Hajebi from the University of Waterloo gave an online talk at the Virtual Discrete Math Colloquium on bounding the tree-width of graphs with forbidden induced subgraphs. The title of his talk was “Holes, hubs and bounded treewidth“.

## Eric Vigoda gave a talk on determining computational phase transitions for approximate counting/sampling by Markov Chain Monte Carlo (MCMC) algorithms at the Discrete Math Seminar

On July 4, 2022, Eric Vigoda from the UC Santa Barbara gave a talk at the Discrete Math Seminar on determining computational phase transitions from the fast mixing to the NP-hardness for approximate counting/sampling by Markov Chain Monte Carlo (MCMC) algorithms. The title of his talk was “Computational phase transition and MCMC algorithms“.