On October 29, 2019, Pascal Gollin from IBS discrete mathematics group gave a talk on the existence of a decomposition of an infinite graph into spanning trees in terms of the existence of packing and covering of spanning trees at the discrete math seminar. The title of his talk was “A Cantor-Bernstein-type theorem for spanning trees in infinite graphs“.

## Joonkyung Lee (이준경) presented a recent work on weakly norming and norming graphs at the discrete math seminar

On October 22, 2019, Joonkyung Lee (이준경) from University of Hamburg gave a talk based on his recent work on weakly norming and norming graphs. The title of his talk was “On some properties of graph norms“.

## Zi-Xia Song (宋梓霞) gave a talk on Ramsey numbers under Gallai colorings at the discrete math seminar

On October 15, 2019, Prof Zi-Xia Song (宋梓霞) from University of Central Florida (UCF) presented a talk about Ramsey numbers under Gallai colorings. The title of her talk was “Ramsey numbers of cycles under Gallai colorings.”

## Alexandr V. Kostochka gave a talk on a problem related to the graph reconstruction conjecture at the discrete math seminar

On October 10, 2019, Prof. Alexandr V. Kostochka from the University of Illinois at Urbana-Champaign gave a talk at the discrete math seminar. The title of his talk was “Reconstructing graphs from smaller subgraphs“.

## Alexandr V. Kostochka gave a colloquium talk on Ramsey-type problems for paths and cycles at the KAIST MathSci – IBS DIMAG Joint Colloquium

On October 8, 2019, Prof. Alexandr V. Kostochka from the University of Illinois at Urbana-Champaign gave a colloquium talk at the KAIST Mathematical Sciences – IBS Discrete Mathematics Group Joint Colloquium. The title of his talk was “On Ramsey-type problems for paths and cycles in dense graphs“. He will stay one week at IBS Discrete Mathematics Group.

## Please share the poster for our postdoctoral research fellowship

## The poster for the conference “Seymour is Seventy” (June 15-19, 2020) is now available for download.

## Casey Tompkins gave a talk on the extremal problems for Berge hypergraphs at the discrete math seminar

On October 1, 2019, Casey Tompkins at IBS discrete mathematics group presented a seminar talk on an extension of Turán’s theorem to hypergraphs. The title of his talk was “Extremal problems for Berge hypergraphs“.

## Welcome Pascal Gollin, a new research fellow in the IBS discrete mathematics group

The IBS discrete mathematics group welcomes Dr. Pascal Gollin, a new research fellow at the IBS discrete mathematics group from October 1, 2019.

He received his Ph.D. from Department of Mathematics, Universität Hamburg in Germany in 2019 under the supervision of Prof. Reinhard Diestel. Welcome!