#14965: FloatingPoint exception when multiplying matrix over QQ by vector over
SR
-------------------------------------+-------------------------------------
Reporter: dkrenn | Owner:
Type: defect | Status: needs_info
Priority: major | Milestone: sage-
Component: linear algebra | duplicate/invalid/wontfix
Keywords: matrix, vector, | Resolution:
mutliplication, floatingpoint | Merged in:
exception | Reviewers: Jeroen Demeyer
Authors: | Work issues:
Report Upstream: N/A | Commit:
Branch: | Stopgaps:
Dependencies: |
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Comment (by nbruin):
Replying to [comment:4 jdemeyer]:
> It was probably fixed by the Maxima upgrade: #13973
Not for me:
{{{
Maxima 5.33.0 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) is
(notequal(84644440725961403098463183554485799389772425728699536724546678651368471662755793858191462623325951275455550962101277270763335324980423888503086416881487600951168887632284102290001262851926718316596582705934285641705714110547524777517804311041930987129930496818273454551255885915706318740821679919000000000000000000000*x/422165920314471048721358275854632323285179941428330150821135511815100042994592631347355397175387243022779234708963662480477375868719044084318634583443223137428890926160543699705457864438134730545535596936604372279922247951010042249163649352110753480952771747316504857000652757440826179465253453626540111934123296968384641+2097152/10460353203,0));
Maxima encountered a Lisp error:
#<a ARITHMETIC-ERROR>
}}}
I confirm that on 6.3.beta4 I'm not getting the error reported on this
ticket, so it seems that sage now avoids this issue. The bug is still
there in maxima, though, and it may well be possible to trigger it in a
different way from sage.
--
Ticket URL: <http://trac.sagemath.org/ticket/14965#comment:5>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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