Hi, I am Hyunjoon Choi. I am a (hobby) mathematician. I leisurely upload interesting math problems and some articles if I want to share something new.
I graduated KAIST (Korean Advanced Institute of Technology) on February 14, 2025. (2018-2025. I had 2 resting years)
The two people that I admire in terms of research attitudes are professor Ewan D. Stewart (https://profstewart.org/) and Richard Feynmann.
In Topology, I admire the lecturing style of professor Woojin Kim (https://wj-kim.com/) from KAIST. He taught me Topology this year (2024 Spring).
When I want to get some math inspirations, I surf through https://mathsci.kaist.ac.kr/pow/ and https://www.quantamagazine.org/ for nice problems and articles.
I enjoy giving lectures on IB (International Baccalaureate) Mathematics and Physics, and Oxford/Cambridge Math Tests (MAT).
The below sections are going to be regularly updated.