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Or the more relevant link might be https://en.wikipedia.org/wiki/Torus#Flat_torus https://en.wikipedia.org/wiki/Torus#Flat_torus
by jacobolus 8y ago
Or the more relevant link might be https://en.wikipedia.org/wiki/Torus#Flat_torus https://en.wikipedia.org/wiki/Torus#Flat_torus