## Florian Gut and Attila Joó gave an online talk on the existence of a large vertex flame in every rooted directed graph of size ℵ_1 at the Virtual Discrete Math Colloquium

On June 30, 2021, Florian Gut and Attila Joó (University of Hamburg) gave an online talk at the Virtual Discrete Math Colloquium on their new result proving that every rooted directed graph of size $\aleph_1$ has a large vertex flame. The title of their talk was “Large vertex-flames in uncountable digraphs“.

## Attila Joó gave a talk on the partition of a set into bases of finitary matroids and cofinitary matroids at the discrete math seminar

On December 19, 2019, Attila Joó from University of Hamburg presented a talk on the partitioning of the ground set into bases of finitary and cofinitary matroids at the discrete math seminar. The title of his talk was “Base partition for finitary-cofinitary matroid families”.

기초과학연구원 수리및계산과학연구단 이산수학그룹
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IBS Discrete Mathematics Group (DIMAG)
Institute for Basic Science (IBS)
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E-mail: dimag@ibs.re.kr, Fax: +82-42-878-9209