On Wed, 11 May 2005, Robert Jerrard wrote:
> On Tue, 2003-11-11 at 08:58 +0100, kovzol wrote:
>> our software, WebMathematics Interactive, which is mainly based on Maxima
>> services, came to release yesterday. You can test it on
>> http://wmi.math.u-szeged.hu and/or read the most recent information about
>> it on http://wmi.sf.net.
>
> Looks like a nice product! However, some tweaking seems to be in order.
> In trying "Limit of Functions 1, dynamic test" from the Thematic Module,
> Limit of Functions, I selected the Maxima choice (upper right corner)
> and responded to the test questions, see Screen1.jpg. Upon hitting
> evaluate I was given Screen2.jpg. There seems to be an issue with
> Maxima. The Maple choice did not have the same issues but since we have
> Maxima not Maple I am interested in what the problem is. Have I done
> something incorrectly?
Sorry for the long delay.
The problem is as follows:
---------------------------------------------------------------8X----
Maxima 5.9.1 http://maxima.sourceforge.net
Using Lisp CMU Common Lisp CVS release-19a 19a-release-20040728 + minimal
debian patches
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
This is a development version of Maxima. The function bug_report()
provides bug reporting information.
(%i1) is(equal(minf,-inf));
SIGN called on UND.
-- an error. Quitting. To debug this try DEBUGMODE(TRUE);
---------------------------------------------------------------8X----
Similar run is the result with other versions:
---------------------------------------------------------------8X----
GCL (GNU Common Lisp) Version(2.5.0) Thu Dec 5 08:07:35 EST 2002
Licensed under GNU Library General Public License
Contains Enhancements by W. Schelter
Maxima 5.9.0 http://maxima.sourceforge.net
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
This is a development version of Maxima. The function bug_report()
provides bug reporting information.
(C1) is(equal(inf,-minf));
SIGN called on UND.
-- an error. Quitting. To debug this try DEBUGMODE(TRUE);)
---------------------------------------------------------------8X----
In my opinion we should get TRUE. Is this probably a Maxima problem?
Best regards, and thanks for the feedback!
Zoltan