July 2022

Sepehr Hajebi, Holes, hubs and bounded treewidth

Zoom ID: 869 4632 6610 (ibsdimag)

A hole in a graph $G$ is an induced cycle of length at least four, and for every hole $H$ in $G$, a vertex $h\in G\setminus H$ is called a

Kevin Hendrey, Product Structure of Graph Classes with Bounded Treewidth

Room B232 IBS (기초과학연구원)

The strong product $G\boxtimes H$ of graphs $G$ and $H$ is the graph on the cartesian product $V(G)\times V(H)$ such that vertices $(v,w)$ and $(x,y)$ are adjacent if and only

Jinyoung Park (박진영), Thresholds 1/2

Room B332 IBS (기초과학연구원)

Thresholds for increasing properties of random structures are a central concern in probabilistic combinatorics and related areas. In 2006, Kahn and Kalai conjectured that for any nontrivial increasing property on

Jinyoung Park (박진영), Thresholds 2/2

Room B332 IBS (기초과학연구원)

Thresholds for increasing properties of random structures are a central concern in probabilistic combinatorics and related areas. In 2006, Kahn and Kalai conjectured that for any nontrivial increasing property on

Noam Lifshitz, Product free sets in the alternating group

Zoom ID: 870 0312 9412 (ibsecopro) [CLOSED]

A subset of a group is said to be product free if it does not contain the product of two elements in it. We consider how large can a product

August 2022

Seunghun Lee (이승훈), Inscribable order types

Room B332 IBS (기초과학연구원)

We call an order type inscribable if it is realized by a point configuration where all extreme points are all on a circle. In this talk, we investigate inscribability of

Lars Jaffke, Taming graphs with no large creatures and skinny ladders

Zoom ID: 869 4632 6610 (ibsdimag)

We confirm a conjecture of Gartland and Lokshtanov : if for a hereditary graph class $\mathcal{G}$ there exists a constant $k$ such that no member of $\mathcal{G}$ contains a $k$-creature

Eun Jung Kim (김은정), Directed flow-augmentation

Room B332 IBS (기초과학연구원)

We show a flow-augmentation algorithm in directed graphs: There exists a polynomial-time algorithm that, given a directed graph G, two integers $s,t\in V(G)$, and an integer $k$, adds (randomly) to

Akash Kumar, Random walks and Forbidden Minors

Zoom ID: 870 0312 9412 (ibsecopro) [CLOSED]

Random walks and spectral methods have had a strong influence on modern graph algorithms as evidenced by the extensive literature on the subject. In this talk, I will present how

Noleen Köhler, Testing first-order definable properties on bounded degree graphs

Room B332 IBS (기초과학연구원)

Property testers are probabilistic algorithms aiming to solve a decision problem efficiently in the context of big-data. A property tester for a property P has to decide (with high probability

기초과학연구원 수리및계산과학연구단 이산수학그룹
대전 유성구 엑스포로 55 (우) 34126
IBS Discrete Mathematics Group (DIMAG)
Institute for Basic Science (IBS)
55 Expo-ro Yuseong-gu Daejeon 34126 South Korea
E-mail: dimag@ibs.re.kr, Fax: +82-42-878-9209