Hello, I’m Jungho Ahn, a student at Discrete Mathematics Group (DIMAG) in Institute for Basic Science (IBS), and a Ph.D. student at Department of Mathematical Sciences in KAIST, supervised by Sang-il Oum.

My research interests lie in Structural and Algorithmic Graph Theory. More specifically, I’m interesting in graph structures, graph parameters, parameterized complexity including kernelization, and approximation algorithms for graph problems.

Since March 2020, I have been running YouTube channel FPT Complexity. You can see various lecture videos or conference talks about parameterized complexity in there. If you have any comments on this channel, or want to recommend other videos, channels, or playlists, then please let me know via email below. For more information about parameterized complexity, you can visit Parameterized Complexity Community Wiki.

On the top picture, the left is me, the middle is my advisor Sang-il Oum, and the right is my lab mate Duksang Lee. The picture was taken in Jeju Island in November during KSIAM 2018 Annual Meeting.

You can also see my profile on DIMAG site. Nice to meet you!  🙂


Email :

Address :
1) B219 Theory Building IBS, 55 Expo-ro Yuseong-gu Daejeon 34126 South Korea
2) 3427 Natural Science Building KAIST, 291 Daehak-ro Yuseong-gu Daejeon 34141 South Korea


From Dec 2018 – Current :
Student at Discrete Mathematics Group (DIMAG), IBS, Daejeon, South Korea

From Mar 2020 – Current:
Ph.D. Student at Department of Mathematical Sciences, KAIST, Daejeon, South Korea
Advisor: Sang-il Oum

From Mar 2020 – Current:
Director of YouTube channel FPT Complexity


From Mar 2014 – Feb 2018 :
Bachelor of Science, Department of Mathematics, Sungkyunkwan University, Suwon, South Korea

From Feb 2018 – Feb 2020 :
Master of Science in Mathematical Sciences, Department of Mathematical Sciences, KAIST, Daejeon, South Korea (Thesis Link)
Advisor: Sang-il Oum


27 June 2019 :
Outstanding Teaching Assistant Award

Teaching Assistant

2018 Spring in KAIST
– MAS101 Calculus 1
– MAS275 Discrete Mathematics

2018 Fall in KAIST
– MAS109 Introduction to Linear Algebra

2019 Spring in KAIST
– MAS101 Calculus 1

2019 Fall in KAIST
– MAS109 Introduction to Linear Algebra
– MAS477 Introduction to Graph Theory

2020 Spring in KAIST
– Counseling Assistant

2020 Fall in KAIST
– (Head) Counseling Assistant