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2025-12-26 10:38:21 UTC
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John Carlos Baez on Nostr: When we curl up our parallelogram to get a torus, there's also another problem. The ...

When we curl up our parallelogram to get a torus, there's also another problem. The numbers along the left edge aren't equal to the corresponding numbers at the right edge. But they're close! Each number at right is 81/80 times the corresponding number at left. I've drawn red lines connecting them.

So, we just one from each of these 4 pairs. We've already picked one number for all the corners, so we just need to do this for the remaining 2 pairs.

(24/n)