MATRIX-IBS Workshop: Structural Graph Theory Downunder II
This program consists of a short intensive workshop, where mathematicians from across the globe will come together to work on open problems in structural graph theory. We will consider the …
10 events found.
Events
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MATRIX, Australia
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Jaehoon Kim (김재훈), Ramsey numbers of cycles versus general graphs
Room B232 IBS (기초과학연구원)The Ramsey number $R(F,H)$ is the minimum number $N$ such that any $N$-vertex graph either contains a copy of $F$ or its complement contains $H$. Burr in 1981 proved a …
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Ben Lund, Thresholds for incidence properties in finite vector spaces
Room B232 IBS (기초과학연구원)Suppose that $E$ is a subset of $\mathbb{F}_q^n$, so that each point is contained in $E$ with probability $\theta$, independently of all other points. Then, what is the probability that …
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Jean-Florent Raymond, Long induced paths in minor-closed graph classes and beyond
Zoom ID: 869 4632 6610 (ibsdimag)In 1982 Galvin, Rival, and Sands proved that in $K_{t,t}$-subgraph free graphs (t being fixed), the existence of a path of order n guarantees the existence of an induced path …
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IBS ECOPRO Opening conference
Zoom ID: 878 0445 3986 (ibsecopro) [CLOSED]To celebrate the opening of the IBS ECOPRO (Extremal Combinatorics and Probability) Group, we will organize a 3-day online conference from April 4 to April 6. Official Website: https://www.ibs.re.kr/ecopro/event/opening/ Invited …
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Younjin Kim (김연진), On the extremal problems related to Szemerédi’s theorem
Room B232 IBS (기초과학연구원)In 1975, Szemerédi proved that for every real number $\delta > 0 $ and every positive integer $k$, there exists a positive integer $N$ such that every subset $A$ of …
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Jakub Gajarský, Model Checking on Interpretations of Classes of Bounded Local Clique-Width
Zoom ID: 869 4632 6610 (ibsdimag)The first-order model checking problem for finite graphs asks, given a graph G and a first-order sentence $\phi$ as input, to decide whether $\phi$ holds on G. Showing the existence …
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Boram Park (박보람), Odd coloring of sparse graphs
Room B232 IBS (기초과학연구원)We introduce an odd coloring of a graph, which was introduced very recently, motivated by parity type colorings of graphs. A proper vertex coloring of graph $G$ is said to …
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Michael Savery, Induced subgraphs of induced subgraphs of large chromatic number
Zoom ID: 869 4632 6610 (ibsdimag)We prove that for every graph F with at least one edge there are graphs H of arbitrarily large chromatic number and the same clique number as F such that …
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Cheolwon Heo (허철원), The complexity of the matroid-homomorphism problems
Room B332 IBS (기초과학연구원)In this talk, we introduce homomorphisms between binary matroids that generalize graph homomorphisms. For a binary matroid $N$, we prove a complexity dichotomy for the problem $\rm{Hom}_\mathbb{M}(N)$ of deciding if …