https://youtu.be/IQqtsm-bBRU?si=jG4a2qSoAOs-jKvVThis open problem taught me what topology isThe inscribed square/rectangle problem, solved using Möbius strips and Klein bottles.Playlist with more neat proofs: https://www.youtube.com/playlist?list=PL...youtu.be원환면 모양 나오는 것까진 이해를 했는데 뫼비우스의 띠부터 이해하기를 포기함...
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