### Young Researchers in Extremal and Probabilistic Combinatorics

Zoom ID: 554 788 7710 (507464)

The aim of the Young Researchers in Extremal and Probabilistic Combinatorics is to bring together early career researchers working on these topics.  The workshop will consist of several  25 minute talks across three days from October 20 to 22, 2021.  Due to Covid the workshop will be held online. Invited Speakers & Program Oct. 20

### Donggyu Kim (김동규), 𝝘-graphic delta-matroids and their applications

Room B232 IBS (기초과학연구원)

Bouchet (1987) defined delta-matroids by relaxing the base exchange axiom of matroids. Oum (2009) introduced a graphic delta-matroid from a pair of a graph and its vertex subset. We define a $\Gamma$-graphic delta-matroid for an abelian group $\Gamma$, which generalizes a graphic delta-matroid. For an abelian group $\Gamma$, a $\Gamma$-labelled graph is a graph whose

### Jaehoon Kim (김재훈), 2-complexes with unique embeddings in 3-space

Room B232 IBS (기초과학연구원)

A well-known theorem of Whitney states that a 3-connected planar graph admits an essentially unique embedding into the 2-sphere. We prove a 3-dimensional analogue: a simply-connected 2-complex every link graph of which is 3-connected admits an essentially unique locally flat embedding into the 3-sphere, if it admits one at all. This can be thought of

### Martin Milanič, TBA

Zoom ID: 934 3222 0374 (ibsdimag)

### Sebastian Wiederrecht, TBA

Zoom ID: 934 3222 0374 (ibsdimag)

### Fedor Fomin, TBA

Zoom ID: 934 3222 0374 (ibsdimag)

### International Conference on Discrete Mathematics and Computer Science (ICDMCS)

Dalat, Vietnam

The spirit of the International Conference on Discrete Mathematics and Computer Science (ICDMCS), which will be held in Dalat, Vietnam on November 28-30, 2021, is to connect, strengthen and enlarge the network of researchers in these domains in Vietnam. It is a forum for scientists, PhD and master students to exchange ideas and methods, introduce

### David Munhá Correia, TBA

Zoom ID: 934 3222 0374 (ibsdimag)

### 2021 Combinatorics Workshop (2021 조합론 학술대회)

The Bloomvista

The Combinatorics Workshop (조합론 학술대회) is an annual conference of combinatorialists in Korea that started in 2004 by the Yonsei University BK21 Research Group. Since 2013, this workshop has been advised by the committee of discrete mathematics of the Korean Mathematical Society. This year it will take place at The Bloomvista in Yangpyeong on December

### Ken-ichi Kawarabayashi (河原林 健一), TBA

Zoom ID: 934 3222 0374 (ibsdimag)
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