1. anyone who believes that sqrt(x^2) is |x| is mistaken. As Bill Page says, there are two values. 2. any system that automatically produces |x| can be tricked into committing serious errors. Currently, Maxima apparently does this. Some people consider this a feature. Clearly we have a difference of opinion about sqrt. Mathematica leaves the expression unchanged. 3. I tried Maxima 5.23.2 on the integral and got log(-1) which is nonsense. 4. Mathematica 9 answers ln(2).
-- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
