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Untitled edit
I've just started the article since I wanted to link to it (for a Language Log discussion) and was surprised it didn't exist. However, it's well out of my own areas of mathematics, so I hope others can improve it — in particular, the references at the moment are just a semi-random selection of mathscinet/arxiv/google hits, not chosen for any particular significance. Pit-trout (talk) 16:00, 7 November 2010 (UTC)