Themosthighstrange@lemmy.world to Lemmy Shitpost@lemmy.world · 1 个月前The cylinder must remain unharmedlemmy.worldimagemessage-square77linkfedilinkarrow-up1472arrow-down15
arrow-up1467arrow-down1imageThe cylinder must remain unharmedlemmy.worldThemosthighstrange@lemmy.world to Lemmy Shitpost@lemmy.world · 1 个月前message-square77linkfedilink
minus-squarejdr@lemmy.mllinkfedilinkarrow-up13·30 天前I’m a topologist, and this is correct. https://en.wikipedia.org/wiki/3-torus
minus-squarejxk@sh.itjust.workslinkfedilinkarrow-up4·30 天前Isn’t the 3-torus a 3-dimensional space? The surgace of this mug is two-dimensional. But I agree that it’s a “torus with three holes”
I’m a topologist, and this is correct.
https://en.wikipedia.org/wiki/3-torus
Isn’t the 3-torus a 3-dimensional space? The surgace of this mug is two-dimensional. But I agree that it’s a “torus with three holes”