群与图讨论班 Seminars on Groups and Graphs

这是群论和图论方向的线上系列报告，我们希望能够促进国内外青年学者（博士生为主）在群论和图论研究上的交流。报告主题分布在（但不限于）以下研究方向：

- 有限单群（有限单群分类定理，子群结构，共轭类等）
- 置换群及其在组合结构上的作用
- 线性代数群与李型群
- 有限群的表示
- 有限\(p\)-群
- 图的谱理论

This is a platform for young group theorists and graph theorists (mostly PhD students) to talk about their research and related topics online. The topic can be anything related to group theory and graph theory, including but not limited to the following.

- Finite simple groups (CFSG, subgroup structures and conjugacy classes)
- Permutation groups and their actions on combinatorial structures
- Linear algebraic groups and Lie type groups
- Representations of finite groups
- Finite \(p\)-groups
- Spectral theory of graphs

Time

一般地，系列报告定期于北京时间每周三下午16:00-17:00进行。

Our usual time is Wednesday 16:00-17:00 (GMT+8).

Forthcoming Seminars

May 8th: Đorđe Mitrović (University of Auckland) Zoom 616 601 4311 (passcode: gts2024)
May 22nd: Coen del Valle (University of St Andrews) Zoom 616 601 4311 (passcode: gts2024)
June 5th: 狄文帝 Wendi Di (SUSTech) Zoom 616 601 4311 (passcode: gts2024)
June 17th: 曾青 Qing Zeng (Beijing Normal University) Zoom 616 601 4311 (passcode: gts2024)

The Next Seminar

Title: The base size of the symmetric group

Speaker: Coen del Valle (University of St. Andrews)

Time: 16:00-17:00 (GMT+8), Wednesday May 22nd

Location: Zoom: 616 601 4311 (passcode: gts2024)

Abstract: A base for a group of permutations of a set \(\Omega\) is a subset of \(\Omega\) whose pointwise stabiliser contains only the identity permutation. Useful for computational applications, determining the minimum possible size of a base --- called the base size --- of a group has been the subject of a large amount of research over the past forty years. In this talk we will discuss results pertaining to the base size of the symmetric group \(S_n\), and describe recent work which completely determines the base size of all primitive actions of \(S_n\).

Current Organizers

陈俊彦 Junyan Chen (SUSTech)
丁兆宸 Zhaochen Ding (University of Auckland)
黄弘毅 Hong Yi Huang (University of Bristol)
尹富纲 Fu-Gang Yin (Central South University)

The seminar is currently based at the Southern University of Science and Technology (SUSTech, 南方科技大学).