Mathematically speaking, another way to think about it is this: sqrt(x**2) != x (same reasoning, try x < 0)
A little more generically: sqrt(x**2) == norm(x) ("2 norm of x") You may (not) be interested in this wikipedia article: http://en.wikipedia.org/wiki/Norm_(mathematics) -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sy...@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.