Lie-rings

"Lie-rings. David Pierce. Athens, summer, 2005. (From Plato's door, according to 
Tzetzes [12th c.]: MhdeÈc ‚gewmètrhtoc eÊsÐtw mou t˜n stèghn. Why did the ..."

http://mat.msgsu.edu.tr/~dpierce/Talks/2005Athens/slides.pdf