#13973: Upgrade Maxima past the release 5.29.1
------------------------------------------------------------------+---------
Reporter: dimpase |
Owner: tbd
Type: defect |
Status: new
Priority: major |
Milestone: sage-5.11
Component: packages: standard |
Resolution:
Keywords: sd48 | Work
issues:
Report Upstream: Reported upstream. Developers acknowledge bug. |
Reviewers:
Authors: Jeroen Demeyer | Merged
in:
Dependencies: |
Stopgaps:
------------------------------------------------------------------+---------
Changes (by kcrisman):
* dependencies: #13364 =>
* upstream: N/A => Reported upstream. Developers acknowledge bug.
Comment:
Thanks to Barton Willis for this workaround.
{{{
This bug is due to circa January 2013 changes to matrix inversion. A
workaround is to set ratmx to true:
Maxima branch_5_30_base_98_g29f9239_dirty http://maxima.sourceforge.net
using Lisp Clozure Common Lisp Version 1.9-r15764 (WindowsX8632)
(%i1) matrixexp(matrix([%i*%pi]));
Unable to find the spectral representation
(%i2) matrixexp(matrix([%i*%pi])), ratmx=true;
(%o2) - 1
}}}
I've reported this [https://sourceforge.net/p/maxima/bugs/2596/ here]. I
don't know if doing this ratmx thing universally is good, though:
{{{
if FALSE will cause determinant and matrix addition, subtraction, and
multiplication to be performed in the representation of the matrix
elements and will cause the result of matrix inversion to be left in
general representation. If it is TRUE, the 4 operations mentioned above
will be performed in CRE form and the result of matrix inverse will be in
CRE form. Note that this may cause the elements to be expanded (depending
on the setting of RATFAC) which might not always be desired.
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13973#comment:22>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/groups/opt_out.
