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2023-10-16 14:27:13

Robert McNees on Nostr: Crossing Brougham Bridge in Dublin #OTD in 1843, William Hamilton had a flash of ...

Crossing Brougham Bridge in Dublin #OTD in 1843, William Hamilton had a flash of insight. He finally understood how to multiply quaternions after puzzling over the problem for years. He scratched the result into the stone:

i² = j² = k² = ijk = -1

Image: Wikimedia

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