### Duksang Lee (이덕상), Intertwining connectivities for vertex-minors and pivot-minors

Room B232 IBS (기초과학연구원)

We show that for pairs (Q,R) and (S,T) of disjoint subsets of vertices of a graph G, if G is sufficiently large, then there exists a vertex v in V(G)−(Q∪R∪S∪T) such

### Linda Cook, Two results on graphs with holes of restricted lengths

Room B232 IBS (기초과학연구원)

We call an induced cycle of length at least four a hole. The parity of a hole is the parity of its length. Forbidding holes of certain types in a graph

### Petr Hliněný, Twin-width is linear in the poset width

Zoom ID: 934 3222 0374 (ibsdimag)

### Eun Jung Kim (김은정), A Constant-factor Approximation for Weighted Bond Cover

Room B232 IBS (기초과학연구원)

The Weighted $\mathcal F$-Vertex Deletion for a class $\mathcal F$ of graphs asks, given a weighted graph $G$, for a minimum weight vertex set $S$ such that $G-S\in\mathcal F$. The

### Ilkyoo Choi (최일규), On independent domination of regular graphs

Room B232 IBS (기초과학연구원)

Given a graph $G$, a dominating set of $G$ is a set $S$ of vertices such that each vertex not in $S$ has a neighbor in $S$. The domination number of $G$,

### Sang-hyun Kim (김상현), On rational 2×2 matrices without relations

Room B232 IBS (기초과학연구원)

For a rational number $q= s/r$, we consider the two 2x2 matrices $A=\begin{pmatrix}1&0\\1&1\end{pmatrix}$ and  $B_q=\begin{pmatrix}1&q\\0&1\end{pmatrix}$. It is a long-standing conjecture (traced at least back to Rimhak Ree) that A and

### Cheolwon Heo (허철원), TBA

Room B232 IBS (기초과학연구원)

### Joonkyung Lee (이준경), TBA

Room B232 IBS (기초과학연구원)
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