Author Archives: gmcdavid

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About gmcdavid

Retired IT professional with a wide range of interests. Married. Three sons, two with autistic-spectrum disorders and the third being transgender with Ehlers-Danlos syndrome. From Chicago but now living in the Twin Cities metro, Minnesota. Episcopalian. Carleton College (BA 1972, physics) and Stanford University (MS 1974, Applied Physics; MS 1976 Statistics).

To Protect, Serve, and Sell Out:

The Mongol Imperial Guard and the Roman Praetorian Guard

Whereas the Mongol Imperial Guard were created with honest intent and found to be exclusively loyal to their political patron, the khan, the Roman Praetorian Guard were often bribed to sacrifice their own values for the political agendas of the Senate and swayed by their own agendas to oust one emperor for another better suited.

From RogueClassicism.

Imaginary numbers and reality

Imaginary Numbers are Real.

I first visited the complex plane 45 years ago, in High School. It was love at first sight, and I have been smitten ever since. Thank you, Margaret Matchett, my math teacher that year.

EDIT: I just looked her up on the Mathematics Genealogy Project. Go back three “generations” and you get to Ludwig Boltzmann, whose work has fascinated me since I first heard about it, not long after Mrs. Matchett’s math class.