Guangzhou Discrete Mathematics Seminar is a seminar series which covers all aspects of discrete mathematics, and started at Sun Yat-sen University, Guangzhou, China, in Fall 2017. The seminars take place frequently during term time - approximately once every two weeks, at School of Mathematics, Sun Yat-sen University. The usual meeting room and day of the week for the seminars are generally fixed for a particular semester, but these are expected to vary from one semester to another.
The seminars aim to promote the presence of discrete mathematics in Guangzhou, as well as to strengthen the discrete mathematics community there.
Everyone is welcome to attend. If anyone is interested in giving a seminar talk, or for general enquiries, please contact one of the organisers.
Organisers
Ping Hu: huping9 AT mail DOT sysu DOT edu DOT cn
Henry Liu: liaozhx5 AT mail DOT sysu DOT edu DOT cn
Chao Yang: yangchao AT gdufs DOT edu DOT cn
Zanbo Zhang: eltonzhang2001 AT gmail DOT com
How to get to School of Mathematics, Sun Yat-sen University
Upcoming talks
2024.2
Spring 2024, TBA
Past talks
2024.1
5 January 2024 (Friday), 4:30-5:30pm Beijing time, room 519 and online, Tencent Meeting ID: 121 027 368
Rong Wu (Shanghai Jiao Tong University, Shanghai, China) Graphs with girth 9 and without longer odd holes are 3-colorable Poster Slides
For a number l ≥ 2, let Gl denote the family of graphs which have girth 2l + 1 and have no odd hole with length greater than 2l + 1. Wu, Xu and Xu conjectured that every graph in ∪l≥2 Gl is 3-colorable. Chudnovsky et al., Wu et al., and Chen showed that every graph in G2, G3 and ∪l≥5 Gl is 3-colorable respectively. In this paper, we prove that every graph in G4 is 3-colorable. This confirms Wu, Xu and Xu's conjecture.
Archive
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