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).

Political Seismology

Eric Cantor’s Loss Was Like an Earthquake

Everybody is talking how it was big and far-reaching surprise, but here Nate Silver has something more subtle in mind: The statistics of Republican primary results look a lot like those of earthquakes, and he presents the graphs to show it. Major primary upsets, like serious earthquakes, are rare but they do happen. Furthermore, they are fundamentally random and unpredictable.

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Fun with infinite series

Does 0.999… = 1? And Are Divergent Series the Invention of the Devil?

Which refers to a saying by Niels Henrik Abel

The divergent series are the invention of the devil, and it is a shame to base on them any demonstration whatsoever. By using them, one may draw any conclusion he pleases and that is why these series have produced so many fallacies and so many paradoxes …

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