I sometimes type my notes, mostly as TA materials. They are usually posted on my Korean blog, so most of them list my name as Dexter Kim.
English notes
Frobenius theorem in GR
Mobius transform and rotations
Particles in curved spacetime
Recursion using Adler's zero
Massive spinor-helicity variables: A user guide
Lecture notes on modern amplitude methods @ KHU (part 1)
(part 2)
Korean notes
이항전개와 수치근사
S. Weinberg, "Four golden lessons" (Korean translation)
"Why solve problems?", excerpt from "Feynman Lectures on Computation" (Korean translation)
Selected talk slides
Review on QFT-inspired methods for gravitational wave physics (APCTP, 2023)
Selected talk recordings
Algebra of graphs for scattering dynamics (ACPMS online seminars, 2025)
Compactly packaging PM dynamics: a fresh look at the eikonal (Amplitudes 2025)