#2488 radexpand:all/true broken

[Stavros Macrakis]

block([radexpand:all], sqrt(x^2) ) => sqrt(x^2), should be x per doc
block([radexpand:true,domain:'real], sqrt(x^2) ) => sqrt(x^2), should be abs(x) per doc

Tested in Maxima 5.27.0 2012-04-30 11:59:06 i686-apple-darwin11.3.0 SBCL 1.0.55.0-abb03f9

[Raymond Toy]

Maxima version too old? I get this with the current sources (and cmucl):

block([radexpand:all], sqrt(x^2) ) => x
block([radexpand:true,domain:'real], sqrt(x^2) ) => abs(x)

[kcrisman]

I think that the documentation is currently just wrong. It says:

(c) If RADEXPAND is FALSE, or RADEXPAND is TRUE and DOMAIN is COMPLEX, SQRT(X^2) will be returned.

Maxima 5.29.1 http://maxima.sourceforge.net
using Lisp ECL 12.12.1
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) radexpand;
(%o1) true
(%i2) domain:complex;
(%o2) complex
(%i3) radcan(sqrt(x^2));
(%o3) x
(%i4) radexpand:false;
(%o4) false
(%i5) radcan(sqrt(x^2));
(%o5) x
(%i6) domain:real;
(%o6) real
(%i7) radcan(sqrt(x^2));
(%o7) x

So in no case do we seem to get sqrt(x^2) returned. Well, we get it in the case we don't use radcan!