This open problem taught me what topology is

The inscribed square/rectangle problem, solved using Möbius strips and Klein bottles. Playlist with more neat proofs: Instead of sponsored ad reads, these lessons are funded directly by viewers: An equally valuable form of support is to simply share the videos. This argument was originally by Herbert Vaughan, appearing for examples in this issue of the Topology Proceedings. The on-screen argument for why all closed non-orientable surfaces must intersect themselves in 3d is a slight variation on one I heard from Dan Asimov. 2020 Paper by Greene and Lobb: Nice Quanta article about this result: https:// ... #3Blue1Brown #Mathematics #three_blue_one_brown #3_blue_1_brown #3b1b #3brown1blue #3_brown_1_blue #three_brown_one_blue 20241224 IQqtsm-bBRU