### Jinha Kim (김진하), Collapsibility of Non-Cover Complexes of Graphs

Room B232 IBS (기초과학연구원)

Let $G$ be a graph on the vertex set $V$. A vertex subset $W \subset V$ is a cover of $G$ if $V \setminus W$ is an independent set of $G$, and $W$ is a non-cover of $G$ if $W$ is not a cover of $G$. The non-cover complex of $G$ is a simplicial complex

### Zihan Tan, Towards Tight(er) Bounds for the Excluded Grid Theorem

Zoom

We study the Excluded Grid Theorem, a fundamental structural result in graph theory, that was proved by Robertson and Seymour in their seminal work on graph minors. The theorem states that there is a function $f$, such that for every integer $g > 0$, every graph of treewidth at least $f(g)$ contains the g×g-grid as a minor. For every

Livestream

### Hong Liu (刘鸿), Cycles and trees in graphs (1/8)

Zoom

This lecture series covers several different techniques on embedding paths/trees/cycles in (pseudo)random graphs/expanders as (induced) subgraphs. Zoom ID : 8628398170 Password : 123450

Livestream

### Hong Liu (刘鸿), Cycles and trees in graphs (2/8)

Zoom

This lecture series covers several different techniques on embedding paths/trees/cycles in (pseudo)random graphs/expanders as (induced) subgraphs. Zoom ID : 8628398170 Password : 123450

Livestream

### Hong Liu (刘鸿), Cycles and trees in graphs (3/8)

Zoom

This lecture series covers several different techniques on embedding paths/trees/cycles in (pseudo)random graphs/expanders as (induced) subgraphs. Zoom ID : 8628398170 Password : 123450

Livestream

### Hong Liu (刘鸿), Cycles and trees in graphs (4/8)

Zoom

This lecture series covers several different techniques on embedding paths/trees/cycles in (pseudo)random graphs/expanders as (induced) subgraphs. Zoom ID : 8628398170 Password : 123450

Livestream

### Hong Liu (刘鸿), Cycles and trees in graphs (5/8)

Zoom

This lecture series covers several different techniques on embedding paths/trees/cycles in (pseudo)random graphs/expanders as (induced) subgraphs. Zoom ID : 8628398170 Password : 123450

Livestream

### Hong Liu (刘鸿), Cycles and trees in graphs (6/8)

Zoom

This lecture series covers several different techniques on embedding paths/trees/cycles in (pseudo)random graphs/expanders as (induced) subgraphs. Zoom ID : 8628398170 Password : 123450

Livestream

### Hong Liu (刘鸿), Cycles and trees in graphs (7/8)

Zoom

This lecture series covers several different techniques on embedding paths/trees/cycles in (pseudo)random graphs/expanders as (induced) subgraphs. Zoom ID : 8628398170 Password : 123450

Livestream

### Hong Liu (刘鸿), Cycles and trees in graphs (8/8)

Zoom

This lecture series covers several different techniques on embedding paths/trees/cycles in (pseudo)random graphs/expanders as (induced) subgraphs. Zoom ID : 8628398170 Password : 123450

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