double integrals seem to give different answers


On Sun, 22 Nov 2009, G. Jay Kerns wrote:

< Dear Leo,
< 
< On Sun, Nov 22, 2009 at 4:37 AM, Leo Butler <l.butler at ed.ac.uk> wrote:
< > Just to be clear, this is not the root of the error for this integral.
< > You can verify that by declaring
< >
< > assume(rho >= 0);
< >
< > and computing the two integrals.
< >
< > Leo
< >
< > --
< > The University of Edinburgh is a charitable body, registered in
< > Scotland, with registration number SC005336.
< >
< 
< Thanks for the remarks, but no, for the record, different answers are
< returned (on my system, at least) even with
< 
< assume(rho >= 0);
< 
< I am running i-386 Debian sid with the below Maxima version info.  I
< also observe this on Ubuntu 9.10 amd64.
< 
< Regards,
< Jay
< 
< 
 
Jay, we agree on the evidence, but the interpretation is off.
I believe that the evidence shows that the different answers are not
caused by Maxima's handling of (rho^(3/2))^2. Leo.

-- 
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.