Original post: https://mathstodon.xyz/@johncarlosbaez/114411644426781422 https://cdn.nostrcheck.me/5536951a9ddf5d8b391843b5c66b5916f2578dd0e514d2cf0b10c24b70c2955b/cd0951778c43e4aa4abf31752a238e52cf3c8c7d076ce5dfea06c63eaea0be15.webp https://cdn.nostrcheck.me/5536951a9ddf5d8b391843b5c66b5916f2578dd0e514d2cf0b10c24b70c2955b/cd0951778c43e4aa4abf31752a238e52cf3c8c7d076ce5dfea06c63eaea0be15.webp
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