On August 24, Monday, the 2020 Combinatorics Workshop (2020 조합론 학술대회) was held online due to the COVID-19 pandemic. This local workshop series began in 2004 and has been continued to be one of the biggest annual gathering of people in combinatorics located in Korea. Due to the COVID-19 pandemic, it has been reduced to a one-day online conference on Zoom. It was hosted by Kyung Hee University and IBS Discrete Mathematics Group.

The workshop website: https://cw2020.combinatorics.kr

## There were 5 invited speakers.

**Sejeong Bang (방세정)**, Yeungnam University, *Geometric distance-regular graphs***Ringi Kim (김린기)**, KAIST, *Decomposing planar graphs into graphs with degree restrictions***Sangwook Kim (김상욱)**, Chonnam National University, *Combinatorics of lattice path matroid polytopes***Jinyoung Park (박진영)**, Institute for Advanced Study, *Tuza’s Conjecture for random graphs***Jongyook Park (박종육)**, Kyungpook National University, *On distance-regular graphs with induced subgraphs $K_{r,t}$*

## There were 4 contributed talks.

**Byung-Hak Hwang (황병학)**, Seoul National University, *Acyclic orientation polynomials***Jaeseong Oh (오재성)**, Seoul National University, *On linearization coefficients of q-Laguerre polynomials***Jun Seok Oh (오준석)**, Incheon National University, *An inverse Erdős-Ginzburg-Ziv theorem for finite groups***Tuan Tran**, IBS Discrete Mathematics Group, *The singularity of random combinatorial matrices*