Klein Bottles - Numberphile
Why Hacker News recommends it
HN likes it for Cliff Stoll's infectious passion for topology, and it gets linked in threads about him and about Mobius strips.
What it is
Numberphile interviews Cliff Stoll about Klein bottles, the one-sided surfaces with no inside or outside. Stoll explains them with characteristic enthusiasm and shows off his collection.
Recommended by 1 HN commenters across 1 different months, 2015 to 2022.
What Hacker News said
Strong rec baldfat · 2017-02 · on “The Hidden Twist to Making a Möbius Strip”
If anyone is talking about Mobius Strips then Cliff Stoll MUST be mentioned. This guys passion for Mobius Strips is infectious. [this video] Also he was one of the first system admins to actually catch a hacker who was using his server in Germany in 1989. [LINK]
Cites bambax · 2015-06 · on “The man with 1,000 klein bottles under his house [video]”
Yes, in the video I'm talking about [this video] he says that a bootle has an edge (~3'40). A sphere does not have an "inner surface", it has just one surface. So does a potato. If you go from sphere to potato to bowl, when does an edge appear and does it have to appear, is my question.
Cites O__________O · 2022-08 · on “Cybersecurity in 1989: Looking back at “The Cuckoo's Egg” (2015)”
Interesting, didn’t realize that’s Cliff. - Related Numberphile: [this video] - Direct link to his Klein bottle website: [LINK]