Who cares about topology? (Old version)
4 人推荐 · 跨 4 个月 · 2017–2020
中文导读
3Blue1Brown 早期的拓扑学惊艳之作，围绕几何学中的“内接矩形问题”（inscribed rectangle problem）展开，层层揭示环面（tori）与莫比乌斯环（Möbius strip）如何不可思议地成为解题钥匙。
为什么 HN 推它
许多 3Blue1Brown 铁粉心中不可撼动的最爱视频之一，把一个纯数学几何难题讲得如同侦探小说般抽丝剥茧。
「我个人格外偏爱讲内接正方形问题的那一期。」HN 网友原话：A particular favourite is the one on the Inscribed Square Problem
英文原摘要（HackerTube / Claude 整理）
An older 3Blue1Brown video on why topology matters, built around the inscribed rectangle problem. It walks through how tori and Mobius strips appear in the solution. The channel later replaced it with an updated version.
Fans name it as a favorite 3Blue1Brown video, praising its detective-story treatment of the inscribed square and rectangle problem.
HN 上的提及
One of my favorite videos from his channel is "Who cares about topology? (Inscribed rectangle problem)
I'd still wholeheartedly recommend his other videos though.
A particular favourite is the one on the Inscribed Square Problem
Here's a nice 3blue1brown video about the easier version of the inscribed rectangle problem