B. Sun @seoulinside.bsky.social · 15/10/2026The Hyperinflation Archive [Part 1] seoulinside.substack.com/p/the-hyperi...seoulinside.substack.comThe Hyperinflation Archive [Part 1]This series asks one question: what is inflation? 000 0
B. Sun @seoulinside.bsky.social · 13/10/2026seoulinside.substack.com/p/why-do-we-...seoulinside.substack.comWhy Do We Learn Matrices in Textbooks?From_Matrices_to_LLMs_and_GPUs 000 0
B. Sun @seoulinside.bsky.social · 12/10/2026Is Urban Growth Entropy or a Random Walk? seoulinside.substack.com/p/is-urban-g...seoulinside.substack.comIs Urban Growth Entropy or a Random Walk?The observation that Seoul grows near its old downtown is not evidence of a well (a centripetal pull); it is what unbiased diffusion already predicts. 010 0
B. Sun @seoulinside.bsky.social · 12/10/2026seoulinside.substack.com/p/the-2-perc...seoulinside.substack.comThe 2 Percent Target in the Face of Supply Shocks: How Flexible Is Inflation Targeting?Evidence from the Bank of Korea and Major Central Banks, 2025–26 000 0
B. Sun @seoulinside.bsky.social · 11/10/2026Complex Functions, Made Easy to Follow seoulinside.substack.com/p/complex-fu...seoulinside.substack.comComplex Functions, Made Easy to Follow [Part 0]Watching a Point Rotate 000 0
B. Sun @seoulinside.bsky.social · 10/10/2026An Introduction to the Navier–Stokes Equations: The Million-Dollar Question in a Coffee Cup seoulinside.substack.com/p/an-introdu... The Navier–Stokes equations calculate the motion of things that flow, like water and air. They apply Newton’s “force = mass × acceleration” to fluids.seoulinside.substack.comAn Introduction to the Navier–Stokes Equations: The Million-Dollar Question in a Coffee CupNavier–Stokes Equations An Archive Not a Textbook Existence and Smoothness : 000 0
B. Sun @seoulinside.bsky.social · 09/10/2026Based on the Melon Chart as of October 1, 2026, the top 3 male idol groups are | 1. CORTIS 'REDRED', 2. ATEEZ - 'BAD', 3. BIGBANG - ‘BiiiG’ M/V seoulinside.substack.com/p/live-kpop-...seoulinside.substack.comLive : Kpop BG | J.S. Von (Update 2026.10.1) | Chart Watch , New Releases , Idol NewsTOP3 | 1. CORTIS ‘REDRED’ , ATEEZ - ‘BAD’ , BIGBANG - ‘BiiiG’ M/V 000 0
B. Sun @seoulinside.bsky.social · 09/10/2026Based on the Melon Chart as of October 1, 2026, the top 3 female girl groups are: Top 3 SOYEON, RESCENE 'LOVE ATTACK', I.O.I - Suddenly MV. Recently, RESCENE has been very strong as well, but first place was taken by SOYEON, seoulinside.substack.com/p/live-kpop-...seoulinside.substack.comLive : Kpop GG | J.S. Von (2026.10.1) | Chart Watch , New Releases , Idol NewsTop 3 SOYEON, RESCENE ‘LOVE ATTACK’ , I.O.I - Suddenly MV 000 0
B. Sun @seoulinside.bsky.social · 09/10/2026seoulinside.substack.com/p/map-recons... Map: Reconstruction | Part 12 — Cash Settlement Casebook (7 Complexes + Case Law & Statutes + Practice Guide, October 2026)seoulinside.substack.comMap: Reconstruction | Part 12 — Cash Settlement Casebook (7 Complexes + Case Law & Statutes + Practice Guide, October 2026)Part 12 — Cash Settlement (Hyeongeum Cheongsan) 000 0
B. Sun @seoulinside.bsky.social · 09/10/2026Riemann Hypothesis: What Does Re(s) = 1/2 Actually Mean? seoulinside.substack.com/p/riemann-hy...seoulinside.substack.comRiemann Hypothesis: What Does Re(s) = 1/2 Actually Mean?“The Riemann Hypothesis states that all non-trivial zeros of the zeta function lie on the line whose real part is 1/2.” 000 0
B. Sun @seoulinside.bsky.social · 08/10/2026seoulinside.substack.com/p/p-vs-np-th...seoulinside.substack.comP vs. NP: The Missing Key“Checking an answer is so easy, so why is finding one so hard?” 000 0
B. Sun @seoulinside.bsky.social · 07/10/2026seoulinside.substack.com/p/the-equati...seoulinside.substack.comThe Equation That Counts Rational Points - The Birch–Swinnerton-Dyer (BSD) Conjecture · An Introduction for NewcomersBSD Interactive Page.html 000 0
B. Sun @seoulinside.bsky.social · 06/10/2026seoulinside.substack.com/p/the-moment...seoulinside.substack.comThe Moment a Third Star Arrives, the Formula DisappearsAn Entry Point to the Three-Body Problem: Three Lines of Math and a Prize Story 000 0
B. Sun @seoulinside.bsky.social · 03/10/2026What Is a Vacuum? — Volume 1 From "Nature Abhors a Vacuum" to the Exit of the Aether, and Beyond seoulinside.substack.com/p/what-is-a-...seoulinside.substack.comWhat Is a Vacuum? — Volume 1 From "Nature Abhors a Vacuum" to the Exit of the Aether, and BeyondPart 1. 000 0
B. Sun @seoulinside.bsky.social · 01/10/2026 seoulinside.substack.com/p/map-recons...seoulinside.substack.comMap: Reconstruction | Part 12 — Cash Settlement Casebook (7 Complexes + Case Law & Statutes + Practice Guide, October 2026)Part 12 — Cash Settlement (Hyeongeum Cheongsan) 000 0
B. Sun @seoulinside.bsky.social · 21/09/2026seoulinside.substack.com/.../the-thre.... “Two stars, Newton solved perfectly. But add just one more star and the formula disappears. Not that we haven’t found it — it’s been proven there isn’t one. While proving that, Poincaré invented chaos theory.seoulinside.substack.com 011 0
B. Sun @seoulinside.bsky.social · 12/09/2026seoulinside.medium.com/war-diary-of... War Diary of Admiral Yi Sun-sin: A Day-by-Day Firsthand Account of Korea’s 16th-Century Naval War (1592–1598) 1st day, Im-sul. Clear. At dawn, my younger brother Yeo-pil, my nephew Bang, and my son Hoe came to talk. But my heart was heavyseoulinside.medium.comWar Diary of Admiral Yi Sun-sin: A Day-by-Day Firsthand Account of Korea’s 16th-Century Naval War…[壬辰 (1592) January] 000 0
B. Sun @seoulinside.bsky.social · 11/09/2026Live : Kpop GG | J.S. Von (26.09.11) | Chart Watch , New Releases , Idol News IU 'Dear my crazy soulmate' MV Hearts2Hearts 하츠투하츠 'Moonride' MV JISOO - CLICK (Official MV) seoulinside.substack.com/p/live-kpop-...seoulinside.substack.comLive : Kpop GG | J.S. Von (26.09.11) | Chart Watch , New Releases , Idol NewsIU 'Dear my crazy soulmate' MV Hearts2Hearts 하츠투하츠 'Moonride' MV JISOO - CLICK (Official MV) 000 0
B. Sun @seoulinside.bsky.social · 11/09/2026Live : Kpop BG | J.S. Von (Update 26.09.10) | Chart Watch , New Releases , Idol News EVAN ‘Death of Me’ Official MV [New Release] |Mark Lee - My Friend [MV] hrtz.wav(하츠웨이브) _ ALIVE (Feat. SUNGCHAN(성찬) of RIIZE) seoulinside.substack.com/p/live-kpop-...seoulinside.substack.comLive : Kpop BG | J.S. Von (Update 26.09.10) | Chart Watch , New Releases , Idol NewsEVAN ‘Death of Me’ Official MV [New Release] |Mark Lee - My Friend [MV] hrtz.wav(하츠웨이브) _ ALIVE (Feat. SUNGCHAN(성찬) of RIIZE) 000 0
B. Sun @seoulinside.bsky.social · 11/09/2026Live : Issue | J.S. Von (Update 26.09.11) Korea, As It Happens | Memes & Issues | The romance of the lights-out Line 1 subway.gif seoulinside.substack.com/p/live-korea...seoulinside.substack.comLive : Issue | J.S. Von (Update 26.09.03)Korea, As It Happens | Memes & Issues 001 0
B. Sun @seoulinside.bsky.social · 10/09/2026When the Buckwheat Blooms | Yi Hyo-seok (1907–1942) - The whole flank of the mountain was buckwheat, and the buckwheat was in flower, just beginning, and the flowers were white as salt scattered across the hills, white and still and breathing ... seoulinside.medium.com/history-yi-h...seoulinside.medium.comMedium 000 0
B. Sun @seoulinside.bsky.social · 06/09/2026Made some light tweaks so it works great on mobile right out of the box. It now starts in simple mode by default, and you can tap 💻 anytime to bring up the full control panel. | LHCkerr.html seoulinside.substack.com/p/made-some-...seoulinside.substack.comMade some light tweaks so it works great on mobile right out of the box. It now starts in simple mode by default, and you can tap 💻 anytime to bring up the full control panel.LHCkerr.html 010 0
B. Sun @seoulinside.bsky.social · 05/09/2026From Coins to Compasses: The 2D Random Walk — Why the Drunkard Stays Near the Pub, According to Rayleigh The Drunken Sailor Walks the Complex Plane 0. Where the Story Begins — A Letter (1905) seoulinside.substack.com/p/from-coins...seoulinside.substack.comFrom Coins to Compasses: The 2D Random Walk — Why the Drunkard Stays Near the Pub, According to RayleighSeoul's real estate, markets, and technology — reported in depth, in English. B. Sun 000 0
B. Sun @seoulinside.bsky.social · 04/09/2026Quantum Mechanical Modeling of the Hydrogen Atom: Formulas, Corrections, and Simulation The Hydrogen Atom: A Quantum Guide with Code seoulinside.substack.com/p/quantum-me...seoulinside.substack.comQuantum Mechanical Modeling of the Hydrogen Atom: Formulas, Corrections, and SimulationThe Hydrogen Atom: A Quantum Guide with Code 000 0
B. Sun @seoulinside.bsky.social · 04/09/2026Coin Flips and Random Walks: The Basics (Part 1) Flip n coins at once. Each coin independently lands heads with probability p, or tails with probability (1−p). Let X be the number of heads in one trial: X = X₁ + X₂ + ⋯ + Xₙ seoulinside.substack.com/p/coin-flips...seoulinside.substack.comCoin Flips and Random Walks: The Basics (Part 1)A companion explainer for the interactive simulation What the simulation actually counts 000 0
B. Sun @seoulinside.bsky.social · 04/09/2026Live : Kpop GG | J.S. Von (26.09.04) | Chart Watch , New Releases , Idol News JISOO - CLICK (Official MV) | LISA - SaWaDiKa (Official Music Video) | [New Releases] seoulinside.substack.com/p/live-kpop-...seoulinside.substack.comLive : Kpop GG | J.S. Von (26.09.04) | Chart Watch , New Releases , Idol NewsJISOO - CLICK (Official MV) | LISA - SaWaDiKa (Official Music Video) | [New Releases] 000 0
B. Sun @seoulinside.bsky.social · 04/09/2026Quantum Mechanical Modeling of the Hydrogen Atom: Formulas, Corrections, and Simulation | The Hydrogen Atom: A Quantum Guide with Code seoulinside.medium.com/quantum-mech... xur94-maker.github.io/SeoulInside/...seoulinside.medium.comQuantum Mechanical Modeling of the Hydrogen Atom: Formulas, Corrections, and Simulation | The…hydrogen_atom_simulation_reference.html 010 0
B. Sun @seoulinside.bsky.social · 03/09/2026I just published History : Chunhyangjeon (18th c.) | 1–2 / 6 seoulinside.medium.com/history-chun...seoulinside.medium.comHistory : Chunhyangjeon (18th c.) | 1–2 / 6“Hey there, Bangja!” 000 0
B. Sun @seoulinside.bsky.social · 02/09/2026Hunmin Jeongeum Haerye (1446) | King Sejong the Great (1397–1450, r. 1418–1450) seoulinside.medium.com/history-king... 000 0
B. Sun @seoulinside.bsky.social · 02/09/2026Making Kimchi, Part 1: Salting Why We Salt Kimchi — Or More Precisely, Why We Salt the Kind Meant to Last seoulinside.medium.com/making-kimch...seoulinside.medium.comMaking Kimchi, Part 1: Salting Why We Salt Kimchi — Or More Precisely, Why We Salt the Kind Meant…First, one thing to clear up: not all kimchi is salted. Geotjeori (fresh, unfermented kimchi) is barely salted — if at all — and gets… 000 0
B. Sun @seoulinside.bsky.social · 01/09/2026Simple Math, Scarce People | The Simplicity Paradox: What Ilya Sutskever’s Lost List Reveals About AI Talent, Knowledge, and the Gap Between Them seoulinside.medium.com/simple-math-...seoulinside.medium.comSimple Math, Scarce People | The Simplicity Paradox: What Ilya Sutskever’s Lost List Reveals About…Part One: The Myth, The Paradox, and The Reality of AI Talent Prologue: A List That Was Never Meant to Exist Sometime in 2021 or 2022, John… 000 0
B. Sun @seoulinside.bsky.social · 01/09/2026 The Locker seoulinside.medium.com/the-locker-9...seoulinside.medium.comThe LockerNot metaphorically. A physical locker — the kind found in shared workspaces, the kind that costs between 100,000 and 150,000 won per month… 000 0
B. Sun @seoulinside.bsky.social · 01/09/2026 The Translator Problem seoulinside.medium.com/the-translat...seoulinside.medium.comThe Translator ProblemThe call was about a reconstruction project. 000 0
B. Sun @seoulinside.bsky.social · 01/09/2026The Citizen Who Beat a Law Firm — With AI and No Legal Training seoulinside.medium.com/the-citizen-...seoulinside.medium.comThe Citizen Who Beat a Law Firm — With AI and No Legal TrainingThere is a version of this story that writes itself: the underdog, the establishment, the surprising victory. Korean media reported it that… 000 0
B. Sun @seoulinside.bsky.social · 01/09/2026How a Korean gaming giant’s CEO consulted ChatGPT instead of his lawyers — and watched those conversations become the prosecution’s best evidence. | seoulinside.medium.com/how-a-korean... 000 0
B. Sun @seoulinside.bsky.social · 01/09/2026AI Thinks It Knows You. MIT Just Proved It Doesn’t | Every major AI assistant today claims to personalize. They ask your age, your income, your risk tolerance. They make you feel seen. : seoulinside.medium.com/ai-thinks-it...seoulinside.medium.comAI Thinks It Knows You.AI Thinks It Knows You. MIT Just Proved It Doesn’t Every major AI assistant today claims to personalize. They ask your age, your income… 000 0
B. Sun @seoulinside.bsky.social · 19/08/2026seoulinside.substack.com/p/map-recons...seoulinside.substack.comMap: Reconstruction | Part 5A — Stage-by-Stage Duration Data (Seoul & Capital Area, March 2026)Part 5‑A — Capital Area Maintenance Project Stage‑by‑Stage Duration Data 000 0
B. Sun @seoulinside.bsky.social · 19/08/2026seoulinside.substack.com/p/map-recons...seoulinside.substack.comMap: Reconstruction | Part 5B — Failure & Drift Casebook (Seoul & Capital Area, March 2026)Part 5‑B — Failure / Drift Cases 000 0
B. Sun @seoulinside.bsky.social · 11/08/2026seoulinside.substack.com/p/reconstruc...seoulinside.substack.comMap: Reconstruction & Redevelopment | Construction Cost & Burden Fee Comprehensive Reference MaterialPart 2 — April 2026 Final Reference Date: April 23, 2026 000 0
B. Sun @seoulinside.bsky.social · 11/08/2026seoulinside.substack.com/p/map-seoul-...seoulinside.substack.comMap: Seoul Reconstruction | Suspension & Delay Case Analysis, March 2026Part 6A — Reconstruction & Redevelopment Suspension/Delay Condition Analysis Data as of March 14, 2026 000 0
B. Sun @seoulinside.bsky.social · 08/08/2026seoulinside.substack.com/p/playlist-s...seoulinside.substack.comPlaylist: Stray Kids | New Era Begins Today With 'THIS & THAT' — A Career Timeline From "Hellevator" to Right Now2026 This & That: 000 0
B. Sun @seoulinside.bsky.social · 08/08/2026seoulinside.substack.com/p/why-we-sal...seoulinside.substack.comKitchen : 김치 담그기 1편 — 절이기 | Making Kimchi, Part 1: SaltingWhy We Salt Kimchi — Or More Precisely, Why We Salt the Kind Meant to Last 000 0
B. Sun @seoulinside.bsky.social · 08/08/2026seoulinside.substack.com/p/map-seoul-...seoulinside.substack.comMap: Seoul Reconstruction | Suspension & Delay Case Analysis, March 2026Part 6A — Reconstruction & Redevelopment Suspension/Delay Condition Analysis Data as of March 14, 2026 000 0
B. Sun @seoulinside.bsky.social · 08/08/2026seoulinside.substack.com/p/reconstruc...seoulinside.substack.comMap: Reconstruction & Redevelopment | Construction Cost & Burden Fee Comprehensive Reference MaterialPart 2 — April 2026 Final Reference Date: April 23, 2026 000 0
B. Sun @seoulinside.bsky.social · 18/07/2026Playlist: Melon Top 25 [2026.07.18] | #1 RESCENE - "LOVE ATTACK", #2 I.O.I - "Suddenly", #3 CORTIS - "REDRED", #4 ILLIT - "It's Me", #5 aespa - "LEMONADE" open.substack.com/pub/seoulins...open.substack.comPlaylist: Melon Top 25 [2026.07.18] | #1 RESCENE - "LOVE ATTACK", #2 I.O.I - "Suddenly", #3 CORTIS - "REDRED", #4 ILLIT - "It's Me", #5 aespa - "LEMONADE"https://www.melon.com/chart/index.htm 000 0
B. Sun @seoulinside.bsky.social · 17/07/2026Brief: WONWOO (SEVENTEEN) released his new single '봄, 여름, 가을, 겨울' (Japanese ver. 'Four Seasons') today via PLEDIS ENTERTAINMENT, a heartfelt self-composed ballad gifted to CARATs to mark his birthday. open.substack.com/pub/seoulins...open.substack.comBrief: WONWOO (SEVENTEEN) released his new single '봄, 여름, 가을, 겨울' (Japanese ver. 'Four Seasons') today via PLEDIS ENTERTAINMENT, a heartfelt self-composed ballad gifted to CARATs to mark his birthday.고개 (Gogae) — 000 0
B. Sun @seoulinside.bsky.social · 15/07/2026Brief: SUNMI released her new MV 'Forever July' today via ABYSS COMPANY, featuring dreamlike, surreal monsoon visuals with umbrella choreography and a hypnotic summer rain atmosphere. open.substack.com/pub/seoulins...open.substack.comBrief: SUNMI released her new MV 'Forever July' today via ABYSS COMPANY, featuring dreamlike, surreal monsoon visuals with umbrella choreography and a hypnotic summer rain atmosphere.Forever July (2026) 000 0
B. Sun @seoulinside.bsky.social · 15/07/2026Brief:《The East Palace》(동궁), starring Nam Joo-hyuk, is an 8-episode Korean original drama set to premiere on Netflix on July 17, 2026. open.substack.com/pub/seoulins...open.substack.comBrief:《The East Palace》(동궁), starring Nam Joo-hyuk, is an 8-episode Korean original drama set to premiere on Netflix on July 17, 2026.《The East Palace》(동궁), starring Nam Joo-hyuk, is an 8-episode Korean original drama set to premiere on Netflix on July 17, 2026. 000 0
B. Sun @seoulinside.bsky.social · 15/07/2026Brief: Picheolin (DINO of SEVENTEEN) released new MV 'Every Goodbye Hurts' today via HYBE LABELS, featuring a city-pop-tinged nocturnal atmosphere and a bittersweet visual narrative of love and loss. open.substack.com/pub/seoulins...open.substack.comBrief: Picheolin (DINO of SEVENTEEN) released new MV 'Every Goodbye Hurts' today via HYBE LABELS, featuring a city-pop-tinged nocturnal atmosphere and a bittersweet visual narrative of love and loss.피철인 (Picheolin) '아프지 않은 이별은 없다 (narr. 이문세)' Official MV 2026. 7. 15. 010 0
B. Sun @seoulinside.bsky.social · 12/07/2026History : Yi Sang (1910–1937) | Read This, Ok-hee — And You Too, All the Brothers of the World open.substack.com/pub/seoulins...open.substack.comHistory : Yi Sang (1910–1937) | Read This, Ok-hee — And You Too, All the Brothers of the WorldRead This, Ok-hee — And All the Brothers of the World, Read It Too 000 0
