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RE: various recent ll1 threads

   > For example, several weeks ago someone sent me some email
   > containing the expression "(+ (* b b) (* 4 a c))"
   > and my mind merely said, "Ah, yes, the quadratic discriminant";
   > when I re-read the email the next day, I was actually surprised
   > to see it was in prefix form, because I had "misremembered" its content
   > as "b*b - 4*a*c".

Sorry, I had a typo: should have been "(- (* b b) (* 4 a c))".