Monthly Archives: June 2013


This gallery contains 26 photos.

Just returned from FPSAC Paris.  I only took a few pictures; they are below.  Here are a few things that were wonderful: The Musée d’Orsay, especially Van Gogh and Monet.  Also, the 3rd floor (which you can hardly tell exists; … Continue reading

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PSA: mass transit

Dear fellow citizens: if you live in a city where mass transit fare payment is enforced by random police sweep, and you have an outstanding warrant, please remember to pay your fare!

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What does “but” mean?

From an AP article about the EPA maybe-sort-of backing off its contention that fracking contributed to water pollution in one particular spot in Wyoming: Environmentalists have voiced concern about fracking causing groundwater pollution for years, but the practice has significantly … Continue reading

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“A Covenant With Death” by Stephen Becker

My mother worked for some time with the late Victor Rabinowitz, who became a close friend of hers.  He was, among other things, extremely literary, but his favorite book was this mass-market legal thriller, the story of a young man … Continue reading

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Proof by induction

If you’re solving a combinatorial problem depending on a parameter n and the first few values are 1, 1, 2, 5, 14, your sequence is the Catalan numbers.  If the next term of the sequence is 42, that constitutes a … Continue reading

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Teacher coaching by students

Not much content here except to say that this Crooked Timber post about one professor’s experience hiring an undergraduate as a teaching coach (he does not use those words) is fascinating.

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