[Maxima-discuss] Maxima implicitly assumes that variable>0

[Dmitry S. <pim...@bk...>]

Maxima implicitly assumes that z>0 in the example below.

I think that the correct output should contain |z| instead of z.

Is it a bug or i am missing something?

By the way, maple's output contains sqrt(z^2) instead of z, i think that 
this is the right approach.


Maxima 5.39.0 http://maxima.sourceforge.net

using Lisp SBCL 1.2.4.debian

Distributed under the GNU Public License. See the file COPYING.

Dedicated to the memory of William Schelter.

The function bug_report() provides bug reporting information.

(%i1) taylor(sqrt(z^2+x^2+y^2),[x,y],0,2);

                                    2    2

                                   x  + y

(%o1)/T/                      z + ------- + . . .

                                     2 z

(%i2)