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Quaternion Plaque on Broom Bridge in Dublin William Rowan Hamilton Plaque Plaque on Broome Bridge on the Royal Canal commemorating William Rowan Hamilton's discovery. The plaque reads: Here as he walked by on the 16th of October 1843 Sir William Rowan Hamilton in a flash of genius discovered the fundamental formula for quaternion multiplication i² = j² = k² = ijk = −1 & cut it on a stone of this bridge.

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Quaternion Plaque on Broom Bridge in Dublin William Rowan Hamilton Plaque Plaque on Broome Bridge on the Royal Canal commemorating William Rowan Hamilton's discovery. The plaque reads: Here as he walked by on the 16th of October 1843 Sir William Rowan Hamilton in a flash of genius discovered the fundamental formula for quaternion multiplication i² = j² = k² = ijk = −1 & cut it on a stone of this bridge.
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Project Gutenberg (gutenberg_org@mastodon.social)'s status on Wednesday, 16-Oct-2024 20:47:24 JST Project Gutenberg
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Three letters, one number, a knife and a stone bridge: how a graffitied equation changed mathematical history.
On October 16 1843, the Irish mathematician William Rowan Hamilton had an epiphany during a walk alongside Dublin’s Royal Canal. He was so excited he took out his penknife and carved his discovery right then and there on Broome Bridge.
By Robyn Arianrhod via @ConversationEDU
https://theconversation.com/three-letters-one-number-a-knife-and-a-stone-bridge-how-a-graffitied-equation-changed-mathematical-history-241034
#mathematics

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