Out of topic: Hal Abelson has a fun quote to Isaac's, which I learned about from my calculus textbook (every new chapter began with a quote): "If I have not s

Out of topic: Hal Abelson has a fun quote to Isaac's, which I learned about from my calculus textbook (every new chapter began with a quote): "If I have not seen as far as others, it is because giants were standing on my shoulders."[1] [1] http://en.wikiquote.org/wiki/Hal_Abelson http://en.wikiquote.org/wiki/Hal_Abelson