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Do the curved triangular shapes made when cars (or even pedestrians) take "shortcuts" at T-junctions (seen here near my house and here in Western Sahara, although this seems like a deliberate one) have a name? What's the mathematics behind them? The psychology?
posted by Jimbob on Aug 25, 2006 - 23 answers

Mathematical imbecile question: what's the simplest, most universal way to add a list of vectors? [more inside]
posted by Jimbob on Feb 19, 2005 - 7 answers