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Robert McNees (mcnees@mastodon.social)'s status on Monday, 16-Oct-2023 14:27:17 UTC Robert McNees

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
In conversation about a year ago from mastodon.social permalink
Attachments
1. Color photo of a gray, cement plaque mounted in the side of a stone bridge in Dublin. 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”
  https://files.mastodon.social/media_attachments/files/111/245/159/912/260/743/original/f2528cba67a092ef.jpeg
- Robert McNees (mcnees@mastodon.social)'s status on Monday, 16-Oct-2023 14:35:49 UTC Robert McNees
  in reply to
  - simonbp
  @simonbp Maybe tied for first.
  In conversation about a year ago permalink
  Attachments
  1. Untitled attachment
    https://files.mastodon.social/media_attachments/files/111/245/193/648/748/536/original/1ab5e3f5a9d30c11.jpeg
- simonbp (simonbp@social.linux.pizza)'s status on Monday, 16-Oct-2023 14:35:50 UTC simonbp
  in reply to
  
  @mcnees Greatest graffiti in Irish history
  
  In conversation about a year ago permalink

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