Posts

• Convergence of Series in AP Calculus BC

  26-04-18

  This brief essay attempts to prove various theorems on convergence of series. The following theorems, better known as convergence tests, are presented in the AP Calculus BC curriculum.

• Things Fall Apart, Chinua Achebe

  26-04-11

  I recently encountered Chinua Achebe’s short story, Civil Peace, which describes post-conflict dynamics following the Nigerian Civil War and how various human beings respond to gain, loss, and sacrifice during painful times. I found the story very impactful, and decided to explore Achebe’s other literary works. Captivated by his restrained tone with powerful delivery, I ended up finishing his magnum opus Things Fall Apart. Here’s what I took away.

• Refactoring the Tmux Multiplexer

  26-03-29

  Tmux, being true to its name, is a terminal multiplexer. This means that it lets the user operate multiple terminals as long-running servers (i.e. closing the terminal emulator will not shut down the terminal – it stays right where it was across app restarts). When I first picked it up, tmux was almost too good to be true. Just a week ago, I decided to quit.

• Messier Marathon 2026

  26-03-22

  I participated in the annual Messier marathon event, from March 21st to March 22nd. The Messier marathon is a stargazing challenge to hunt down all 110 celestial objects in the Messier catalogue in a night. In Korea, a dozen stargazers gather each year in the rural area of Hoengseong county, staying up through the night. I knew of the event some time ago, but it was my first time participating.

• The Decline of Firefox Should Concern Everyone

  26-03-11

  Thousands of tech community posts proclaim “what’s all the Chromium hate about, when it’s open source, fast, and industry-standard?” It is a fair question with a valid point, one that even die-hard Firefox users find hard to attack.

• HMMT February 2026

  26-02-18

  From February 13-17th, I attended the 2026 Harvard-MIT Mathematics Tournament (HMMT). I was part of the Korean team organized by KGSEA, and had a great experience during the five days on MIT campus.

• Genghis Khan and the Making of the Modern World, Jack Weatherford

  26-01-19

  Weatherford’s 2004 book Genghis Khan and the Making of the Modern World lays out the history of the Mongol Empire and its legacy states. The book remains an acclaimed steady-seller two decades after its writing, a feat especially difficult for a history book.

• An Interesting Thought Experiment On Infinite Geometric Series

  26-01-11

  I want to introduce an interesting problem that gives rise to an important idea in mathematics. It is, actually, a common problem in middle school physics and mathematics.

• On uv

  26-01-07

  uv, the next-generation python package manager. I first tried it out a few days ago, mostly out of frustration regarding pip. I made the mistake (or rather, my brew dependency made the mistake) of downloading homebrew python, and pip refused to update packages due to an external installation.

• A Bird's-Eye-View of the Lebesgue Integral

  25-12-25

  I discovered the world of measure theory and the Lebesgue (pronounced la-BEG) integral, when I was told that some functions cannot be integrated with Riemann sums. A more general integral, which has Riemann integrals as its subset, goes down an incredibly deep rabbit hole in the study of the reals.

• Clouds, Moon, and a Lesson

  25-12-07

  On December 6th I visited Geumsan-gun, the southern tip of Chungcheong province. Staying at my grandmother’s place, I planned an ambitious stargazing session, expecting crystal clear weather from the forecast.

• Baby Steps in Understanding the Elliptic Curve

  25-12-04

  The area of an ellipse is given by $\pi a b$, where a and b are half-width and half-height – straightforward enough. But what about the arc length of an ellipse? Faced with a problem infinitely more complex than that of a circle, here mathematicians’ problems begin.

• Custom MicroGNUEmacs Fork

  25-11-20

  MicroGNUEmacs (or mg) has recently replaced Emacs as my primary code editor. The actively maintained editor is a haven for editor minimalists.

• The Theoretical Minimum Really Deserves A Try

  25-11-16

  Professor Susskind’s legendary Stanford lectures on serious introductory physics are being compiled and published into books one by one.

• My First Week of Wolfram Engine

  25-11-08

  Last week I started my journey with the Wolfram Language… for free!

• Chuncheon Marathon 2025

  25-10-26

  One of Korea’s oldest, largest, and most prestigious marathons is held in Chuncheon, Gangwon Province. This year I returned since last participating in 2019.

• Pacman! (with WebAssembly)

  25-10-19

  I made this simple pacman clone nearly three years ago, when I was still a novice python programmer.

• Chusa National Calligraphy Competition 2025

  25-10-19

  Last Saturday, in the midst of autumn’s subtle takeover, I visited Yesan County for Korea’s National Calligraphy Competition.