Monthly Archives: March 2015

Cosma Shalizi gets tenure (at last!) (metastat announcement)

Originally posted on Error Statistics Philosophy:
News Flash! Congratulations to Cosma Shalizi who announced yesterday that he’d been granted tenure (Statistics, Carnegie Mellon). Cosma is a leading error statistician, a creative polymath and long-time blogger (at Three-Toad sloth). Shalizi wrote…

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Primary School Arithmetic and Group Cohomology

Originally posted on Mathematics under the Microscope:
[Originally published on Blogger, Monday, August 28, 2006] In Molier’s Le bourgeois gentilhomme, Monsieur Jourdain was surprised to learn that he had been speaking prose all his life. I was recently reminded (by Mikael…

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Root Systems Recap

Originally posted on The Unapologetic Mathematician:
Let’s look back over what we’ve done. After laying down some definitions on reflections, we defined a root system as a collection of vectors with certain properties. Specifically, each vector is a point in…

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