News - Discrete Mathematics Group

July 20, 2024July 20, 2024

IBS-DIMAG Workshop on Combinatorics and Geometric Measure Theory was held at IBS

The IBS-DIMAG Workshop on Combinatorics and Geometric Measure Theory was held at IBS from July 14 to July 19, 2024. There were 23 talks, including plenary talks by János Pach (Rényi Institute of Mathematics) and Pertti Mattila (University of Helsinki) and invited talks by Izabella Łaba (University of British Columbia), Hong Wang (NYU), and Cosmin Pohoata (Emory University).

Organizers

Doowon Koh (Chungbuk National University)
Ben Lund (IBS Discrete Mathematics Group)
Sang-il Oum (IBS Discrete Mathematics Group / KAIST Department of Mathematical Sciences)

Speakers

János Pach (Plenary Speaker)

Bochen Liu

Giorgis Petridis

Manik Dhar

Jonathan Pakianathan

Izabella Łaba (Invited Speaker)

Mihalis Kolountzakis

Alexander Clifton

Eyvindur Palsson

Steven Senger

Pertti Mattila (Plenary Speaker)

Wei-Hsuan Yu

Hai Long Dao

Hong Wang (Invited Speaker)

Alan Chang

Terry Harris

Charlotte Aten

Semin Yoo

Cosmin Pohoata (Invited Speaker)

Andreas Holmsen

Jinha Kim

Olivine Silier

Matthew Kroeker

July 6, 2024July 6, 2024

Hyunwoo Lee (이현우) gave a talk on disproving Kahn’s conjecture on matchings in d-regular linear hypergraphs at the Discrete Math Seminar

On July 5, 2024, Hyunwoo Lee (이현우) from KAIST and the IBS Extremal Combinatorics and Probability Group gave a talk at the Discrete Math Seminar on disproving Kahn’s conjecture (1995) on matchings in d-regular linear hypergraphs. The title of his talk was “Random matchings in linear hypergraphs“.

July 3, 2024July 6, 2024

Kisun Lee (이기선) gave a talk on a combinatorial characterization of symmetric matrices of symmetric tropical rank 2 at the Discrete Math Seminar

On July 2, 2024, Kisun Lee (이기선) from Clemson University gave a talk at the Discrete Math Seminar on a combinatorial characterization of symmetric matrices of symmetric tropical rank 2. The title of his talk was “symmetric tropical rank 2 matrices“.

July 1, 2024July 6, 2024

Welcome Bjarne Schülke, a new member of the IBS Extremal Combinatorics and Probability Group

The IBS discrete mathematics group welcomes Dr. Bjarne Schülke, a new research fellow at the IBS Extremal Combinatorics and Probability Group starting July 1, 2024.

Dr. Schülke received his Ph.D. from the University of Hamburg in 2021 under the supervision of Christian Reiher and Mathias Schacht. Before joining the IBS Extremal Combinatorics and Probability Group, he was a Harry Bateman Instructor in Mathematics at Caltech, mentored by David Conlon.

He has won the IBS Young Scientist Fellowship. The title of his YSF project is “Variants of the Hypergraph Turán Problem and Extremal Set Theory.”

Welcome!

June 29, 2024July 6, 2024

Wonwoo Kang (강원우) gave a talk on cluster algebras from punctured surfaces at the Discrete Math Seminar

On June 28, 2024, Wonwoo Kang (강원우) from UIUC gave a talk on cluster algebras from punctured surfaces. The title of his talk was “Skein relations for punctured surfaces“.

June 19, 2024July 6, 2024

Semin Yoo (유세민) gave a talk on a generalization of Paley graphs and the quasi-randomness at the Discrete Math Seminar

On June 18, 2024, Semin Yoo (유세민) from the IBS Discrete Mathematics Group gave a talk at the Discrete Math Seminar on a generalization of Paley graphs and the quasi-randomness. The title of her talk was “Paley-like quasi-random graphs arising from polynomials“.

June 12, 2024July 6, 2024

Maria Chudnovsky gave a talk on finding the disjoint union of two graphs of large treewidth as an induced subgraph at the Discrete Math Seminar

On June 11, 2024, Maria Chudnovsky from Princeton University gave a talk at the Discrete Math Seminar on finding the disjoint union of two graphs of large treewidth as an induced subgraph. The title of her talk was “Anticomplete subgraphs of large treewidth“.

June 4, 2024July 6, 2024

Jane Tan gave a talk on coloring hypergraphs with many distinct colors on every edge at the Discrete Math Seminar

On June 4, 2024, Jane Tan from University of Oxford gave a talk at the Discrete Math Seminar on coloring hypergraphs in such a way that every edge has many distinct colors. The title of her talk was “Semi-strong colourings of hypergraphs“.

May 28, 2024July 6, 2024

Yongho Shin (신용호) gave a talk on an online randomized algorithm for edge-weighted online bipartite matching problem at the Discrete Math Seminar

On May 28, 2024, Yongho Shin (신용호) from Yonsei University gave a talk at the Discrete Math Seminar on an online randomized algorithm using three-way online correlated selection for an edge-weighted online bipartite matching problem. His talk title was “Three-way online correlated selection.”

May 23, 2024July 6, 2024

Vadim Lozin gave a talk on classifying monotone graph classes concerning the Hamiltonian cycle problem at the Discrete Math Seminar

On May 21, 2024, Vadim Lozin from the University of Warwick gave a talk at the Discrete Math Seminar on classifying monotone graph classes concerning the Hamiltonian cycle problem. The title of his talk was “Graph problems and monotone classes“.